A.F....... [ZBX-8448] fixed read only object permission validation problems for admin users
Before the fix:
- When host or template belonged to two groups - one read-write and other-read only, an admin user did not have permissions to save existing host or template. In addition user lost template-host linkage when saving template form.
After the fix:
- Added read only objects (hosts, templates and groups) as disabled in host and template forms and corrected several API methods to correctly validate read-only permissions for host group, hosts and templates when they belong to multiple groups with different permissions.