Description of problem: Incorrect tool-tip when removing credentials

Version-Release number of selected component (if applicable): 6.2-1

How reproducible: 100%

Steps to Reproduce:
1. Delete a credential
2.
3.

Actual results:

Tool-tip shows message `Credentials deleted`

Expected results:

Tool-tip shows message `Credential $name is deleted successfully` (or something similar and reasonable)

Additional info: