Incorrect details displayed when reordering sets

repro:

Open BackupMinder with a set name AB-Test, and a set named ZZ-Test

Edit ZZ-text, naming it AA-Test

AA-Test will be listed first, but the main window's view will show the details from ZZ until a job is selected.

Perhaps always selecting the first item in a lit, if present, will help? (am sure there's other ways to solve this)
