Thinking about how to optimize image selection

[Johannes Zarl-Zierl]

Adding mailing list since I lost  it along the way...

> And a third issue, namely if I type ctrl-Q to the viewer in token mode, it
> looks like it tries to apply a token with a non-printable character
> (presumably ctrl-Q) rather than quit.

I fixed the issue by not ignoring key-combos with modifiers when setting tokens.

I also did a quick check on what other dialogs do with Ctrl-Q: all other 
dialogs (annotation dialog, exif info dialog) ignore Ctrl-Q as well.

I'm on the fence: should we continue to ignore Ctrl-Q in those pop up windows? 
Should we close the dialog? Should we propagate it to the main window and quit 
kphotoalbum?

Cheers,
  Johannes