Description of problem:
IWBNI one could press Enter in the ISO image location dialog when installing
a new guest image. Currently one has to press Alt-O to have one's selection
confirmed which is a bit annoying. It works in some other gtk applications
like gedit's Open File dialog
I see this is fixed for F9 in rawhide, but let me fix the bug anyway now for F8
since I wrote this far.
*** This bug has been marked as a duplicate of 426196 ***