fix: prevent closing rooms when spreadsheet editor takes focus

When using =sum() the spreadsheet editor force-takes focus, thus
closing all opened rooms. This is a hack fix that warrants a deeper
design changes to address the underlying issue.

app/assets/javascripts/views/footer/footer_view.ts

@@ -332,6 +332,9 @@ class FooterViewCtrl extends PureViewCtrl<{}, {
       areas: [ComponentArea.Rooms, ComponentArea.Modal],
       focusHandler: (component, focused) => {
         if (component.isEditor() && focused) {
+          if (component.package_info?.identifier === 'org.standardnotes.standard-sheets') {
+            return;
+          }
           this.closeAllRooms();
           this.closeAccountMenu();
         }