Preserve rotation

From Iowa DOT:

> Updating feature collections from the python update script: When feature collections are updated using the Overwrite Hosted Features python script provided, the symbology, popups, attribute settings all remain as you would expect. However, if you have your icons set to be rotated based on an attribute, this functionality gets wiped out after every update of the feature collection. What this means is that when a user adds the feature collection to a new map, they will have to set the rotation. If they have the feature collection in an existing map, the rotation is preserved.

Logged under the widget as well for better visibility while in planning phase:
https://devtopia.esri.com/john4818/arcgis-webappbuilder/issues/298