Mail delete

Added route for moving mail to Trash and then delete them.
On the client mails are deleted from the gui and a delete request is sent to the server.
Mail deletion is handled in the tableDirective.
Added new test cases.
Cleanup
Moves sent mail to Sent-folder

When the from field equals the current user the mail is moved to the Sent-folder.
Implemented mailbox search function

Added route for searching.
Activated search input and button on main view.
Added test cases.