Fixes #11689: hide editor container when hidden value.
http://projects.theforeman.org/issues/11689
Fixes #11450 - Improve hidden parameter handling
Fixes #9194 - displays full fact value
Fixes #9650 - use textarea for global parameters
fixes #6371 - showing the vnc password
Fixes #5926 - hide sensitive parameter values
User can check to hide value when creating or editing global parameter.The value is masked by *** and is also not displayed when overriding.