Add custom capabilities and role
Bookmark current admin page for redirect
Update delete link

To use the admin_post action. Otherwise the function was run on every admin page load
Hook function onto admin_post

better than running on every admin page load
use core capabilities instead of custom
make capability filterable
Merge pull request #406 from humanmade/issue-406

Missing capability check for delete backup
Fix incorrect transient expiry
Merge pull request #536 from humanmade/fix-transients

Transients have incorrect expiry
Merge branch 'master' into re-design

Conflicts:
	admin/actions.php