[OEM-140] Dispatch event after saving bookings.
+ [OE-3308] have added display order to wards so that the order they are displayed in selections for theatre sessions is controllable.
+ [OE-4140] explanation of operation name rules added to admin
+ fix bug in validation of operation name rule admin
Merge branch 'master' into release/1.6
Merge branch 'release/1.6' into develop

Conflicts:
	views/admin/wards.php