Activation Keys: Toggles in "Product Content" are slow - need to be more responsive or use a spinner
Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1207496
Description of problem:
When user toggles an option in Activation Key > Product Content, the backend is slow to respond, but user has no indication of this in the UI. User can end up selecting and trying to toggle the item multiple times but it never actually changes until the backend change has been made. Very confusing user experience.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Create an activation key and assign content to it
2. go to the Activation Key > Product Content subtab.
3. Attempt to toggle various products/repos within the list that appears.
User can toggle multiple times, seemingly to no avail, until the backend triggers a refresh on the UI
Either we should be more responsive and/or flip it independent of the backend processing, or we should include some sort of spinner while the toggle is processing.