Comment 19 for bug 391479

Reading the discussion, there are many nice ideas here that perhaps should belong to separate papercuts:

1: Modal windows should open on their parent's viewport.
2: Modal windows should not steal focus if parents were not focused.
3: Unfocused modal windows should fire an alert on the launcher.
4: All windows of the same app should try to share the same desktop - https://bugs.launchpad.net/hundredpapercuts/+bug/391479/comments/10