RFC: Adjust the visual display of the categories in the "add resource window"

[Thomas Pfeiffer]

> tabs are slightly better, though that would be a significant change from
the
> current UI. if the tabs were integrated visually with the top of the
window
> (so the 'window itself' was tabbed) it could look nice.

Sorry I didn't read your message before replying to the previous one.
I think the tab-like controls in the About app look and work pretty well
and
I don't see why they should not work here.