Method undo

app/views/editor/level/thangs/ThangsTabView.js:220–223

(e)

    }

    undo (e) {
      if (document.activeElement?.id === 'thangs-treema') { return }
      if (!this.editThangView) { this.thangsTreema.undo() } else { this.editThangView.undo() }
    }

    redo (e) {
      if (document.activeElement?.id === 'thangs-treema') { return }