Add masquerade/impersonation feature as admin

[southnode]

Feature Request

Add masquerade/impersonation feature as admin

Feature Information:

As an admin in a enterprise scenario it is often handy to be able to see "through the eyes of the user" particularly when doing screenshots for tickets etc to show exact layouts and where a feature is (in addition to checking permissions in realtime if need be for specific users and the enabling of specific features). WHMCS has a similar feature wherein you can "Login as Owner" and see exactly what they see account-wise. In addition to the feature above, you would want a "Go back to being admin" mode wherein you stop the masquerade/impersonation.

I confirm:

• [x] that I have searched for an existing feature request matching the description.