Make configured WAB widgets hideable

Idea created by MHOOLE_governmentofbc on Jul 3, 2019
    • PSLarkin_SpokaneCounty
    • kmsagis
    • MHOOLE_governmentofbc
    • IBWadmin

    Allow users to be able to hide a widget that they've configured in Web AppBuilder.  Configuration takes time, and during the development process it would be useful to be able to temporarily turn off a widget rather than removing it and then needing to reconfigure it again later if its decided that the widget needs to be included in the App.