Merge branch 'fly-out-min-width' into 'master'

Fix fly-out width when it has long items

See merge request !13371

app/assets/stylesheets/new_sidebar.scss

@@ -229,7 +229,7 @@ $new-sidebar-collapsed-width: 50px;
           position: fixed;
           top: 0;
           left: $new-sidebar-width;
-          width: 150px;
+          min-width: 150px;
           margin-top: -1px;
           padding: 8px 1px;
           background-color: $white-light;