Publisher: Hide unknown publish values

[iLLiCiTiT]

Brief description

Hide unknown publish plugin values to avoid user's confusion.

Description

We showed unknown attributes stored on instance to user which could easily cause confusion because the showed key would not tell user (or us) almost nothing. But it make sense to show the unknown attribute on instances thus there were kept untouched. Mostly visible after changing optional validators as required.

Added option to define attribute definition as "hidden" or "disabled" (both only for UI purposes). Also was added option to define hidden attribute definition that hold any value defined by code.

Testing notes:

1. Set validator supported by Publisher tool as optional
2. Open a host which support Publisher tool and create an instance where the validator would show
3. Close the host and change settings of the validator to be required
4. Open host again and open Publisher tool
5. The active value of validator should not be visible on the instance anymore

Resolves #4099

[ynbot]

Task linked: OP-4409 Publisher: optional switch on validators breaks name in UI

[jakubjezek001]

works well