Allow changing symbology for layers and with Add Data widget

[Tiff]

It would be helpful for end users to be able to change the symbology of data they add through the "Add Data" widget. Especially because the Print widget is available, without having that customization option makes it more difficult for users to be self sufficient using the app. 

If possible, allowing them to change symbology of the layers themselves (especially when there are a lot) can also be very helpful.

[SarahBarks]

Totally agree! Even just being able to change the symbology as the person creating the app would be amazing. At the moment the default is too close to some of our other symbology with zero option to change it.

[jhobb]

This would greatly benefit our organization as well. We are planning a merge from VertiGIS software and our users are used to being able to change the symbology of their added data. It is unfortunate that they wouldn't be able to do this anymore when we switch our apps over to Experience Builder.