The js to hide parameters was moved to lookup_key.js which isn't included in application.js so only templates that include it specifically can hide values.
Related issues
Bug #12937: Hiding parameters doesn't work on anything except host and hostgroup
Added by Ori Rabin over 8 years ago
Fixes #12937 - All parameters can be hidden
The js to hide parameters was moved to lookup_key.js which isn't
included in application.js so only templates that include it
specifically can hide values.