Steps to Reproduce:
1. Go to Installation Source spoke
2. Select the 'ISO file' radio button
3. Click "Choose an ISO"
4. In the dialog, click the upper left icon for location selection
5. Enter "/", click "Open"

5*) alternatively, try another path, e.g. "/var/tmp/"

Actual results:

The "Choose an ISO" button now has no label at all.

*) The "Choose an ISO" button now has label "tmp" instead of the full path


Expected results:

Either always display the full path (even just "/") on the button or reset the title back to "Choose an ISO" if no ISO was actually chosen or present at the given path.