fix: Left hand sidebar text selectable (#33029)

* fix: Add `user-select none` styles to header and room list filters

* chore: remove extra prefixed user-select variants

---------

Co-authored-by: Marley Alford <marleycalford@gmail.com>

packages/shared-components/src/room-list/RoomListHeaderView/RoomListHeaderView.module.css

@@ -25,5 +25,6 @@
         overflow: hidden;
         white-space: nowrap;
         text-overflow: ellipsis;
+        user-select: none; /* currently supported by Chrome, Edge, Opera and Firefox */
     }
 }

packages/shared-components/src/room-list/RoomListPrimaryFilters/RoomListPrimaryFilters.module.css

@@ -20,6 +20,7 @@
      */
     height: 100%;
     flex: 1;
+    user-select: none; /* currently supported by Chrome, Edge, Opera and Firefox */
 }
 
 /* IconButton styles for chevron */