StackContainer's layout implementation is wrong

[millennium]

The StackContainer? promises to be an layoutContainer (isLayoutContainer == true). But in the situation where the StackContainers? (or TabContainer?) "doLayout" property is set to false it fails to keep this promise to the firstchild (or selected) at startup.

looking at the layout function:

if(this.doLayout && this.selectedChildWidget && this.selectedChildWidget.resize){
  this.selectedChildWidget.resize(this._containerContentBox || this._contentBox);
}  

Which doesn't call resize when "doLayout" is false. This should be:

if(this.selectedChildWidget && this.selectedChildWidget.resize) {
  if (this.doLayout) {
    this.selectedChildWidget.resize(this._containerContentBox || this._contentBox);
  }else{
    this.selectedChildWidget.resize();
  }
}

[millennium]

[Patch][CLA]

[bill]

Thanks, dup of #11690.