some more color changes, re #2739

Merge request studip/studip!1859

public/assets/images/icons/blue/bullet-arrow.svg

-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 54 54" xml:space="preserve"><path fill="#28497C" d="M19 11v8.1l7.9 7.9-7.9 7.9V43l16-16z"/></svg>
\ No newline at end of file
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 54 54" xml:space="preserve"><path fill="#28497c" d="M19 11v8.1l7.9 7.9-7.9 7.9V43l16-16z"/></svg>

public/assets/images/icons/blue/bullet-dot.svg

-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 54 54" xml:space="preserve"><circle cx="27" cy="27" r="9" fill="#28497C"/></svg>
\ No newline at end of file
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 54 54" xml:space="preserve"><circle cx="27" cy="27" r="9" fill="#28497c"/></svg>

public/assets/images/icons/blue/bullet-double-arrow.svg

-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 54 54" xml:space="preserve"><g fill="#28497C"><path d="M12.5 11v8.1l7.9 7.9-7.9 7.9V43l16-16z"/><path d="M25.5 11v8.1l7.9 7.9-7.9 7.9V43l16-16z"/></g></svg>
\ No newline at end of file
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 54 54" xml:space="preserve"><g fill="#28497c"><path d="M12.5 11v8.1l7.9 7.9-7.9 7.9V43l16-16z"/><path d="M25.5 11v8.1l7.9 7.9-7.9 7.9V43l16-16z"/></g></svg>

public/assets/images/icons/blue/bullet-line.svg

-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 54 54" xml:space="preserve"><path fill="#28497C" d="M15 23h24v8H15z"/></svg>
\ No newline at end of file
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 54 54" xml:space="preserve"><path fill="#28497c" d="M15 23h24v8H15z"/></svg>

public/assets/images/icons/blue/category-draft.svg

-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 54 54" xml:space="preserve"><g fill="#28497C"><path d="M32 46v-2h15V7H10v15H8V5h41v41z"/><path d="M51 3H6v21h6V9h33v33H30v6h21V3zM5 49V31h3.2L23 45.8V49z"/><path d="M7.3 33 21 46.6v.4H7V33h.3M9 29H3v22h22v-6L9 29zm26.2-14.5c-1.7-.9-3.8-.4-4.8 1.2l-.6 1-.9 1.5L21 31.4l.1 6.6 6-3.2L35 21.5l.9-1.5.6-1c1-1.5.4-3.6-1.3-4.5zm-3.8 3 .6-1c.5-.8 1.6-1.1 2.4-.6.8.5 1.1 1.5.6 2.3l-.6 1-3-1.7z"/></g></svg>
\ No newline at end of file
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 54 54" xml:space="preserve"><g fill="#28497c"><path d="M32 46v-2h15V7H10v15H8V5h41v41z"/><path d="M51 3H6v21h6V9h33v33H30v6h21V3zM5 49V31h3.2L23 45.8V49z"/><path d="M7.3 33 21 46.6v.4H7V33h.3M9 29H3v22h22v-6L9 29zm26.2-14.5c-1.7-.9-3.8-.4-4.8 1.2l-.6 1-.9 1.5L21 31.4l.1 6.6 6-3.2L35 21.5l.9-1.5.6-1c1-1.5.4-3.6-1.3-4.5zm-3.8 3 .6-1c.5-.8 1.6-1.1 2.4-.6.8.5 1.1 1.5.6 2.3l-.6 1-3-1.7z"/></g></svg>

public/assets/images/icons/blue/category-others.svg

-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 54 54" xml:space="preserve"><g fill="#28497C"><path d="M32 46v-2h15V7H10v15H8V5h41v41z"/><path d="M51 3H6v21h6V9h33v33H30v6h21V3zM5 49V31h3.2L23 45.8V49z"/><path d="M7.3 33 21 46.6v.4H7V33h.3M9 29H3v22h22v-6L9 29z"/></g><path d="M28 18c4.4 0 8 3.6 8 8s-3.6 8-8 8-8-3.6-8-8 3.6-8 8-8m0-3c-6.1 0-11 4.9-11 11s4.9 11 11 11 11-5 11-11-4.9-11-11-11z" fill="#28497C"/></svg>
\ No newline at end of file
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 54 54" xml:space="preserve"><g fill="#28497c"><path d="M32 46v-2h15V7H10v15H8V5h41v41z"/><path d="M51 3H6v21h6V9h33v33H30v6h21V3zM5 49V31h3.2L23 45.8V49z"/><path d="M7.3 33 21 46.6v.4H7V33h.3M9 29H3v22h22v-6L9 29z"/></g><path d="M28 18c4.4 0 8 3.6 8 8s-3.6 8-8 8-8-3.6-8-8 3.6-8 8-8m0-3c-6.1 0-11 4.9-11 11s4.9 11 11 11 11-5 11-11-4.9-11-11-11z" fill="#28497c"/></svg>

public/assets/images/icons/blue/category-portfolio.svg

-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 54 54" xml:space="preserve"><g fill="#28497C"><path d="M32 46v-2h15V7H10v15H8V5h41v41z"/><path d="M51 3H6v21h6V9h33v33H30v6h21V3zM5 49V31h3.2L23 45.8V49z"/><path d="M7.3 33 21 46.6v.4H7V33h.3M9 29H3v22h22v-6L9 29zm19-5.5c2.9 0 5.3-2.4 5.3-5.3s-2.4-5.3-5.3-5.3-5.3 2.4-5.3 5.3c0 3 2.4 5.3 5.3 5.3zm4.6 2.4h-9.1c-2 0-3.6 1.6-3.6 3.6V37h16.4v-7.5c-.1-2-1.7-3.6-3.7-3.6z"/></g></svg>
\ No newline at end of file
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 54 54" xml:space="preserve"><g fill="#28497c"><path d="M32 46v-2h15V7H10v15H8V5h41v41z"/><path d="M51 3H6v21h6V9h33v33H30v6h21V3zM5 49V31h3.2L23 45.8V49z"/><path d="M7.3 33 21 46.6v.4H7V33h.3M9 29H3v22h22v-6L9 29zm19-5.5c2.9 0 5.3-2.4 5.3-5.3s-2.4-5.3-5.3-5.3-5.3 2.4-5.3 5.3c0 3 2.4 5.3 5.3 5.3zm4.6 2.4h-9.1c-2 0-3.6 1.6-3.6 3.6V37h16.4v-7.5c-.1-2-1.7-3.6-3.7-3.6z"/></g></svg>

public/assets/images/icons/blue/category-task.svg

-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 54 54" xml:space="preserve"><g fill="#28497C"><path d="M32 46v-2h15V7H10v15H8V5h41v41z"/><path d="M51 3H6v21h6V9h33v33H30v6h21V3zM5 49V31h3.2L23 45.8V49z"/><path d="M7.3 33 21 46.6v.4H7V33h.3M9 29H3v22h22v-6L9 29zm31.1-8-4.2-4.2L25.6 27l-5.4-5.3-4.2 4.2 9.6 9.6L40.1 21z"/></g></svg>
\ No newline at end of file
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 54 54" xml:space="preserve"><g fill="#28497c"><path d="M32 46v-2h15V7H10v15H8V5h41v41z"/><path d="M51 3H6v21h6V9h33v33H30v6h21V3zM5 49V31h3.2L23 45.8V49z"/><path d="M7.3 33 21 46.6v.4H7V33h.3M9 29H3v22h22v-6L9 29zm31.1-8-4.2-4.2L25.6 27l-5.4-5.3-4.2 4.2 9.6 9.6L40.1 21z"/></g></svg>

public/assets/images/icons/blue/category-template.svg

-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 54 54" xml:space="preserve"><g fill="#28497C"><path d="M32 46v-2h15V7H10v15H8V5h41v41z"/><path d="M51 3H6v21h6V9h33v33H30v6h21V3zM5 49V31h3.2L23 45.8V49z"/><path d="M7.3 33 21 46.6v.4H7V33h.3M9 29H3v22h22v-6L9 29z"/></g><path d="m40.1 21-4.2-4.2L25.6 27l-5.4-5.3-4.2 4.2 9.6 9.6L40.1 21z" fill="#28497C"/></svg>
\ No newline at end of file
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 54 54" xml:space="preserve"><g fill="#28497c"><path d="M32 46v-2h15V7H10v15H8V5h41v41z"/><path d="M51 3H6v21h6V9h33v33H30v6h21V3zM5 49V31h3.2L23 45.8V49z"/><path d="M7.3 33 21 46.6v.4H7V33h.3M9 29H3v22h22v-6L9 29z"/></g><path d="m40.1 21-4.2-4.2L25.6 27l-5.4-5.3-4.2 4.2 9.6 9.6L40.1 21z" fill="#28497c"/></svg>

public/assets/images/icons/blue/content2.svg

-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 54 54" xml:space="preserve"><g fill="#28497C"><path d="M32 46v-2h15V7H10v15H8V5h41v41z"/><path d="M51 3H6v21h6V9h33v33H30v6h21V3z"/><path d="M32 33V22H21v-4h15v15z"/><path d="M34 20v11-11m4-4H19v8h11v11h8V16zM5 31h18v18H5z"/><path d="M21 33v14H7V33h14m4-4H3v22h22V29z"/></g></svg>
\ No newline at end of file
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 54 54" xml:space="preserve"><g fill="#28497c"><path d="M32 46v-2h15V7H10v15H8V5h41v41z"/><path d="M51 3H6v21h6V9h33v33H30v6h21V3z"/><path d="M32 33V22H21v-4h15v15z"/><path d="M34 20v11-11m4-4H19v8h11v11h8V16zM5 31h18v18H5z"/><path d="M21 33v14H7V33h14m4-4H3v22h22V29z"/></g></svg>

public/assets/images/icons/blue/oer_elearning.svg

-<svg width="16" height="16" viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg" fill-rule="evenodd" clip-rule="evenodd" stroke-miterlimit="10"><path d="M94.8 66.7V22.5c0-3.5-2.8-6.3-6.3-6.3h-77c-3.5 0-6.3 2.8-6.3 6.3v44.2c-2.7.7-4.7 3.1-4.7 6.1v4.7c0 3.5 2.8 6.3 6.3 6.3h86.4c3.5 0 6.3-2.8 6.3-6.3v-4.7c0-2.9-2-5.4-4.7-6.1zM8.4 22.5c0-1.7 1.4-3.1 3.1-3.1h77c1.7 0 3.1 1.4 3.1 3.1v44H8.4v-44zm88 55c0 1.7-1.4 3.1-3.1 3.1H6.8c-1.7 0-3.1-1.4-3.1-3.1v-4.7c0-1.7 1.4-3.1 3.1-3.1h86.4c1.7 0 3.1 1.4 3.1 3.1v4.7h.1z" fill="#28497c" fill-rule="nonzero"/><path d="M58.6 77.5H41.4c-.9 0-1.6-.7-1.6-1.6 0-.9.7-1.6 1.6-1.6h17.3c.9 0 1.6.7 1.6 1.6 0 .9-.8 1.6-1.7 1.6z" fill="#28497c" fill-rule="nonzero"/><path d="M15.4 28h28.1m-28.1 5.5h25.3m-25.3 6.3H28m-12.6 4.7h14.7" fill="none" stroke="#24437c"/><circle cx="74.9" cy="30.3" r="7" fill="#28497c" transform="rotate(-80.514 74.904 30.259)"/><path d="M89 62.7V45.8s0-5.6-7-5.6h-2.8l-5.6 7-3.1-6.6s-6.8-.4-8.2 3.8c-1.4 4.2-2.8 5.6-2.8 5.6h-9.9l-12.7-8.5 11.3 10v4.1h14.1l4.2-7v14.1H89z" fill="#28497c" fill-rule="nonzero"/></svg>
+<svg width="16" height="16" viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg" fill-rule="evenodd" clip-rule="evenodd" stroke-miterlimit="10"><path d="M94.8 66.7V22.5c0-3.5-2.8-6.3-6.3-6.3h-77c-3.5 0-6.3 2.8-6.3 6.3v44.2c-2.7.7-4.7 3.1-4.7 6.1v4.7c0 3.5 2.8 6.3 6.3 6.3h86.4c3.5 0 6.3-2.8 6.3-6.3v-4.7c0-2.9-2-5.4-4.7-6.1zM8.4 22.5c0-1.7 1.4-3.1 3.1-3.1h77c1.7 0 3.1 1.4 3.1 3.1v44H8.4v-44zm88 55c0 1.7-1.4 3.1-3.1 3.1H6.8c-1.7 0-3.1-1.4-3.1-3.1v-4.7c0-1.7 1.4-3.1 3.1-3.1h86.4c1.7 0 3.1 1.4 3.1 3.1v4.7h.1z" fill="#28497c" fill-rule="nonzero"/><path d="M58.6 77.5H41.4c-.9 0-1.6-.7-1.6-1.6 0-.9.7-1.6 1.6-1.6h17.3c.9 0 1.6.7 1.6 1.6 0 .9-.8 1.6-1.7 1.6z" fill="#28497c" fill-rule="nonzero"/><path d="M15.4 28h28.1m-28.1 5.5h25.3m-25.3 6.3H28m-12.6 4.7h14.7" fill="none" stroke="#28497c"/><circle cx="74.9" cy="30.3" r="7" fill="#28497c" transform="rotate(-80.514 74.904 30.259)"/><path d="M89 62.7V45.8s0-5.6-7-5.6h-2.8l-5.6 7-3.1-6.6s-6.8-.4-8.2 3.8c-1.4 4.2-2.8 5.6-2.8 5.6h-9.9l-12.7-8.5 11.3 10v4.1h14.1l4.2-7v14.1H89z" fill="#28497c" fill-rule="nonzero"/></svg>