Avoid updating frame offset on Layer click. Fixes #1711

src/canvas/view/CanvasView.js

@@ -25,7 +25,7 @@ module.exports = Backbone.View.extend({
    */
   isElInViewport(el) {
     const rect = getElement(el).getBoundingClientRect();
-    const frameRect = this.getFrameOffset(1);
+    const frameRect = this.getFrameOffset();
     const rTop = rect.top;
     const rLeft = rect.left;
     return (

src/editor/model/Editor.js

@@ -563,6 +563,7 @@ module.exports = Backbone.Model.extend({
    * @private
    */
   refreshCanvas() {
+    this.set('canvasOffset', null);
     this.set('canvasOffset', this.get('Canvas').getOffset());
   },