It would be useful to have a key which sets the selected entry to Default (checks the Default checkbox) in the Data Manager's permissions tab.
One suggestion for that key is the Delete key as selecting default does sort of remove the entry (when you switch away from that domain and back again).
Created attachment 493517 [details] [diff] [review]
v1: add DEL key handling for useDefault
This patch applies cleanly on top of bug 588417 but is trivial to merge to current trunk (the dataman.xul hunk may conflict in context).
The patch is pretty easy, but when focus is not on a checkbox or radio control inside the permission item, the keypress goes to the listbox instead, so we need to forward the keypress to the selected item itself.
Pushed as http://hg.mozilla.org/comm-central/rev/0ccddb1b3675