Description of problem:
Assign Tags dialog - unable to assign a tag without mouse - tab doesn't work
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. have a VM
2. have a tag
3. click Assign tab and try to assign a tag without using mouse
tab|space should work, the former should jump on tabs and the latter should select one
enter doesn't work as nothing is selected. though esc does work.
Will be handled in the 4.0 UI rework.