Fix invalid view update from wrong thread

app/src/main/java/de/kuschku/quasseldroid/ui/chat/messages/MessageListFragment.kt

@@ -292,8 +292,10 @@ class MessageListFragment : ServiceBoundFragment() {
             if (previousVisible == visible) {
               loadMore()
             } else {
+              requireActivity().runOnUiThread {
                 swipeRefreshLayout.isRefreshing = false
               }
+            }
 
             previousVisible = visible
           }