Description of problem:

The following buttons in the IPA UI sometimes do the same thing from users'
perspective: Revert, Refresh, Undo, Undo All
Currently, no description is available to help the users understand what the
buttons do and how they differ from each other.

Steps to Reproduce:
For example:
1. Go to Network Services > DNS > DNS Global Configuration and add a forwarder.
2. Click the four buttons - they will all do the same thing: remove the new
forwarder

Expected results:
Adding tool tips with some information about the buttons' purpose would help
prevent users' confusion. For example:

Refresh - Reload current settings from the server
Revert - Undo all unsaved changes
Undo - Undo this change
Undo all - ???

Additional info:
It might actually be helpful to remove some of the buttons completely. Too many
undo/revert buttons can be somewhat confusing.