fix the save, and like live functions for immutable fields
the manage revisions section of immutable fields should now be working
Merge branch 'develop' of https://github.com/unikent/programmes-plant into refactor/fix-immuatable-fields-actions

Conflicts:
	application/views/admin/inc/header.php
Merge pull request #436 from unikent/refactor/fix-immuatable-fields-actions

Fix Immuatable fields actions