Added check for empty list when deleting item in FavoritesActivity

app/src/main/java/ru/volgorobot/vrcatalog/view/FavoritesActivity.java

@@ -87,6 +87,7 @@ public class FavoritesActivity extends AppCompatActivity implements MainContract
                 FavoritesListModel model = (FavoritesListModel) listView.getItemAtPosition(info.position);
                 db.removeItem(model.getID());
                 updateListView();
+                checkForEmptyContent();
             }
         }
         return true;