When checking a feed, check that the key is valid specifically for the feed's
domain.
Improved the GUI's trust confirmation box:
- Use bold headings and indentation instead of boxes.
- If only one key is being queried, don't show the notebook tabs and use the
singular form in the prompt to avoid confusion.
- Only ask the user to trust the key for its particular domain, if 0launch is
new enough to support that.
- If the key is already trusted in other domains, display them to the user.
git-svn-id: file:///home/talex/Backups/sf.net/Subversion/zero-install/trunk/0launch@1626 9f8c893c-44ee-0310-b757-c8ca8341c71e