Fix favourite & people metaspace issue on Chromium browsers (#7301)

res/css/views/rooms/_RoomSublist.scss

@@ -198,6 +198,11 @@ limitations under the License.
             mask-image: linear-gradient(0deg, transparent, black 4px);
         }
 
+        &.mx_RoomSublist_resizeBox_forceExpanded .mx_RoomSublist_tiles {
+            // in this state the div can collapse its height entirely in Chromium, so prevent that by allowing overflow
+            overflow: visible;
+        }
+
         .mx_RoomSublist_resizerHandles_showNButton {
             flex: 0 0 32px;
         }