[Backport staging] Fix avatars in public room & space search being flex shrunk (#11591)

Co-authored-by: Michael Telatynski <[email protected]>

Author: RiotRobot

res/css/views/dialogs/_SpotlightDialog.pcss

@@ -277,6 +277,7 @@ limitations under the License.
                     margin-right: $spacing-8;
                     width: 24px;
                     height: 24px;
+                    flex-shrink: 0;
 
                     .mx_BaseAvatar {
                         width: inherit;

src/components/views/dialogs/spotlight/SpotlightDialog.tsx

@@ -563,7 +563,7 @@ const SpotlightDialog: React.FC<IProps> = ({ initialText = "", initialFilter = n
     };
 
     let otherSearchesSection: JSX.Element | undefined;
-    if (trimmedQuery || filter !== Filter.PublicRooms) {
+    if (trimmedQuery || (filter !== Filter.PublicRooms && filter !== Filter.PublicSpaces)) {
         otherSearchesSection = (
             <div
                 className="mx_SpotlightDialog_section mx_SpotlightDialog_otherSearches"