Add enabling mode

Problem/Motivation

Enhance the Gleap Module with Sites to make it easier to manage by site-building.

Proposed resolution

1. Allow the Site Admin role to configure which roles see the widget.
   • For example, if I want the client to stop submitting UAT I can turn off the module to be exposed to Site Admins, Editors, etc.
   • Another example is when we launch the site, we want to quickly turn off the module from anonymous users.
2. Allow Site Admins to disable and enable the entire widget.
   • The need is that when we decommission Gleap we don’t want to go through a deployment. It would be easier if we could just turn off the widget completely or disable it.

Remaining tasks

User interface changes

Added an enabling checkbox and checkbox for roles.