don't set `overflow: auto` on HTML element, fixes #1293

Closes #1293 and #1294

Merge request studip/studip!789

resources/assets/stylesheets/less/header.less

@@ -9,9 +9,7 @@
     color: @contrast-content-white;
     border-bottom-style: solid;
     height: @bar-bottom-container-height;
-
     width: 100%;
-    position: relative;
 
     display: flex;
     flex-direction: row;
@@ -31,6 +29,11 @@
     z-index: 2;
 }
 
+// Fix header covering relevant other areas
+// @see https://gitlab.studip.de/studip/studip/-/issues/1019
+html {
+    scroll-padding-top: calc(@bar-bottom-container-height + 1em);
+}
 
 #layout_footer,
 #barBottomright {

resources/assets/stylesheets/scss/wiki.scss

@@ -39,9 +39,6 @@ textarea.wiki-editor {
 }
 
 body#wiki #main_content {
-    a:not([href]) {
-        scroll-margin-top: ceil($bar-bottom-container-height + 10);
-    }
     td.printcontent:last-child:not(:first-child) {
         padding-right: 22px;
     }

resources/assets/stylesheets/studip.scss

@@ -48,13 +48,6 @@
     width: 1px;
 }
 
-// Fix header covering relevant other areas
-// @see https://gitlab.studip.de/studip/studip/-/issues/1019
-html {
-    overflow: auto;
-    scroll-padding-top: calc(#{$bar-bottom-container-height} + 1em);
-}
-
 [v-cloak] {
     display: none;
 }