Issue #185: Clean up WidgetTemplateSkin transitions.
Issue #185: Clean up WidgetTemplateSkin transitions.

* Consolidate effect + targets.

* Fade min/close button group when minimized.

* Use s:Resize for WidgetTemplateSkin transitions.

* Remove unnecessary fade effect.

CanterburyRegionalCouncil/arcgis-viewer-flex,Esri/arcgis-viewer-flex,CanterburyRegionalCouncil/arcgis-viewer-flex,Esri/arcgis-viewer-flex,CanterburyRegionalCouncil/arcgis-viewer-flex