Implement mask editor undo/redo (#3708)

src/scripts/changeTracker.ts

@@ -204,6 +204,10 @@ export class ChangeTracker {
         // This can happen when user is holding down "Space" to pan the canvas.
         if (e.repeat) return
 
+        // If the mask editor is opened, we don't want to trigger on key events
+        const comfyApp = app.constructor as typeof ComfyApp
+        if (comfyApp.maskeditor_is_opended?.()) return
+
         const activeEl = document.activeElement
         requestAnimationFrame(async () => {
           let bindInputEl: Element | null = null