Fix toolbar visibility on iframe scroll. Fixes #681

src/commands/view/SelectComponent.js

@@ -419,6 +419,7 @@ module.exports = {
     var unit = 'px';
     var toolbarEl = this.canvas.getToolbarEl();
     var toolbarStyle = toolbarEl.style;
+    const origDisp = toolbarStyle.display;
     toolbarStyle.display = 'block';
     var pos = this.canvas.getTargetToElementDim(toolbarEl, el, {
       elPos,
@@ -427,7 +428,7 @@ module.exports = {
     var leftPos = pos.left + pos.elementWidth - pos.targetWidth;
     toolbarStyle.top = pos.top + unit;
     toolbarStyle.left = leftPos + unit;
-    toolbarStyle.display = '';
+    toolbarStyle.display = origDisp;
   },
 
   /**