Adds ‘edit’ button when managing notifications, schedules, etc.

Overseer has used a standard interface for editing items in Overseer for quite a while. This standard interface makes navigating the software simple-to-use. One thing that was pointed out by one user, however, is that there was no ‘edit’ button on the list screen. Existing users of the Overseer network monitoring software obviously know that you just double-click the item to edit it, but this wasn’t clear to all users.

To accommodate this user, and hopefully make things more obvious to other new users, I’ve added an ‘Edit’ button under the list. This is the same as double clicking the item.