Fix issues related to stage size stored in projects, closes #307

#213 is better permanent solution

src/scaffolding/scaffolding.js

@@ -322,6 +322,12 @@ class Scaffolding extends EventTarget {
     if (this.vm.runtime.cloudOptions) {
       this.vm.runtime.cloudOptions.limit = Infinity;
     }
+    // TODO: remove when https://github.com/TurboWarp/packager/issues/213 is fixed
+    this.vm.on('STAGE_SIZE_CHANGED', (width, height) => {
+      this.width = width;
+      this.height = height;
+      this.relayout();
+    });
 
     this.cloudManager = new Cloud.CloudManager(this);