Make sure user has permission to add space child

lib/pages/chat_list/chat_list.dart

@@ -815,7 +815,6 @@ class ChatListController extends State<ChatList>
                 &&
                 selectedRoomIds
                     .map((id) => Matrix.of(context).client.getRoomById(id))
-                    // .where((e) => !(e?.isPangeaClass ?? true))
                     .every((e) => r.canAddAsParentOf(e)),
             //Pangea#
           )

lib/pangea/extensions/pangea_room_extension/children_and_parents_extension.dart

@@ -128,13 +128,15 @@ extension ChildrenAndParentsRoomExtension on Room {
     return childIds;
   }
 
-  // Checks if can add chat as child
-  // Or whether potential child space is ancestor of this
+  // Checks if has permissions to add child to space
+  // And whether potential child space is ancestor of this
   bool _canAddAsParentOf(Room? child) {
     if (child == null || !child.isSpace) {
       return _canIAddSpaceChild(child);
     }
     if (id == child.id) return false;
-    return !child._allSpaceChildRoomIds.contains(id);
+    return _isRoomAdmin &&
+        child._isRoomAdmin &&
+        !child._allSpaceChildRoomIds.contains(id);
   }
 }