[OEM-109] code elegance change (doesn't change functionality)
[OEM-109] API method canUpdate()
[OEM-109] updated delete view
[OEM-109] request deletion changes
[OEM-109] focus textarea on page load
[OEM-109] showDeleteIcon() api method
[OEM-109] cancel delete bugfix
Merge branch 'hotfix/OEM-109' into release/1.6

Conflicts:
	views/default/delete.php
[OEM-109] tidied delete form
[OEM-109] fixed form
[OEM-109] fixed form
[OEM-109] fixed form
[OEM-109] don't allow cancelling or rescheduling of locked events
Merge branch 'release/1.6' into develop