But this approach completely flips around purpose of my thinking - I did
not want to put anything into specific CR edit forms. This way it works
"automatic", even when we add a new CR form there.

I understand that this is not best approach for everything, cos it is
importing some "magic", but in this case it is not critical feature.
Just a cosmetic thing.

Disabled elements have title set, when you hover to them it appears
usually. But a notice is a good point. I will what what @abenari says.

-- 
Later,

 Lukas "lzap" Zapletal
 irc: lzap #theforeman