remove duplicate rule definitions and adjust to responsive display, fixes #869

Closes #869

resources/assets/stylesheets/fullcalendar.scss

@@ -11,15 +11,28 @@ a.fc-event, td.fc-event {
     }
 }
 
-.fc button.fc-button {
-    @include button();
-    border-radius: 0;
+.fc {
+    .fc-toolbar.fc-header-toolbar {
+        margin-bottom: 0.5em;
+    }
+
+    .fc-button-group {
+        height: 30px;
+
+        .fc-button {
+            @include button();
+            border-radius: 0;
+
+            margin-top: 0;
+            margin-bottom: 0;
+        }
+    }
 }
 
+
 .fc-button-primary:not(:disabled):active,
 .fc-button-primary:not(:disabled).fc-button-active,
 .fc button.fc-button.fc-state-active {
-    -webkit-box-shadow: none;
     box-shadow: none;
 
     background-color: $base-color !important;
@@ -32,7 +45,13 @@ a.fc-event, td.fc-event {
     min-height: 0 !important;
 }*/
 
-.fullcalendar-header {
+.studip-fullcalendar-header {
+    /* This shall look like a table caption. */
+    background-color: transparent;
+    color: $base-gray;
+    font-size: 1.4em;
+    text-align: left;
+
     &.fullcalendar-dialog{
         width: calc(100% - 550px);
         vertical-align: middle;
@@ -202,3 +221,21 @@ a.fc-event, td.fc-event {
         }
     }
 }
+
+
+// Responsive
+.responsive-display {
+    .fc-header-toolbar {
+        .fc-button-group {
+            .fc-button {
+                min-width: 0;
+            }
+        }
+    }
+
+    .fc-view-container {
+        .fc-day-header {
+            overflow: hidden;
+        }
+    }
+}

resources/assets/stylesheets/less/fullcalendar.less

-a.fc-event {
-    border-radius: 0;
-
-    .fc-time {
-        background-color: rgba(255, 255, 255, 0.2);
-        font-weight: bold;
-    }
-}
-
-.fc button.fc-button {
-    .button;
-    border-radius: 0;
-}
-
-.fc-button-primary:not(:disabled):active,
-.fc-button-primary:not(:disabled).fc-button-active,
-.fc button.fc-button.fc-state-active {
-    -webkit-box-shadow: none;
-    box-shadow: none;
-
-    background-color: @base-color !important;
-    color: white;
-}
-
-/* adjust height: */
-/* .fc-scroller.fc-time-grid-container {
-    height: auto !important;
-    min-height: 0 !important;
-}*/
-
-.studip-fullcalendar-header {
-    &.fullcalendar-dialog{
-        width: calc(100% - 550px);
-        vertical-align: middle;
-        display: inline-block;
-        margin-right: 275px;
-    }
-}
-
-.fullcalendar-dialogwidget-container {
-    border-left: 0;
-    display: inline-block;
-    flex: 0 0 auto;
-    margin-bottom: 1em;
-    position: relative;
-
-    @width: 270px;
-
-    padding-bottom: 7px;
-    width: @width;
-    z-index: 2;
-
-
-    .fullcalendar-dialogwidget-widget {
-        background: #fff;
-        border: 1px solid @content-color-40;
-        margin: 15px 0px 0;
-    }
-
-    .fullcalendar-dialogwidget-widget-header {
-        .clearfix();
-        background: @content-color-20;
-        color: @base-color;
-        font-weight: bold;
-        padding: 4px;
-    }
-
-    select.fullcalendar-dialogwidget-selectlist {
-        overflow-y: auto;
-        width: 100%;
-    }
-
-    .fullcalendar-dialogwidget-widget-content {
-        border-top: 1px solid @content-color-40;
-        padding: 4px;
-        transition: all 0.5s;
-    }
-}
-
-.fc {
-    .fc-toolbar.fc-header-toolbar {
-        margin-bottom: 0.5em;
-    }
-
-    .fc-button-group {
-        height: 30px;
-
-        .fc-button {
-            margin-top: 0;
-            margin-bottom: 0;
-        }
-    }
-}
-
-.studip-fullcalendar-header {
-    /* This shall look like a table caption. */
-    background-color: transparent;
-    color: @base-gray;
-    font-size: 1.4em;
-    text-align: left;
-}

resources/assets/stylesheets/studip.less

@@ -90,7 +90,6 @@
 
 @import "less/mvv.less";
 @import "less/overlapping.less";
-@import "less/fullcalendar.less";
 
 @import "less/feedback.less";