fix: Processing... popup in app startup

8e0b537 introduced a call to
`updateMenuState()` at the loadDeckCounts job in order to update the
undo label state when the deck is reloaded.

Following the method name, the whole menu is updated instead of only the
undo label, which includes checking if there are changes to sync
remotely, and that takes time, so it shouldn't be done if not necessary.

The fix isn't the ideal one, but the menu of the deck picker is a zone,
so I'll leave it as is.

AnkiDroid/src/main/java/com/ichi2/anki/DeckPicker.kt

@@ -1038,6 +1038,15 @@ open class DeckPicker :
         }
     }
 
+    private suspend fun updateUndoMenuState() {
+        withOpenColOrNull {
+            optionsMenuState = optionsMenuState?.copy(
+                undoLabel = undoLabel(),
+                undoAvailable = undoAvailable()
+            )
+        }
+    }
+
     private fun updateSearchVisibilityFromState(menu: Menu) {
         optionsMenuState?.run {
             menu.findItem(R.id.deck_picker_action_filter).isVisible = searchIcon
@@ -2132,7 +2141,7 @@ open class DeckPicker :
                 }
                 onDecksLoaded(deckDueTree, collectionHasNoCards)
 
-                updateMenuState()
+                updateUndoMenuState()
             }
         }
     }