[ST] Verify protobuf, xml and other schemas working display

[jankalinic]

After nextJs removal there were missing a few things like html rendering code or link to formated messages. Investigate the state and modify tests if applicable.

[jankalinic]

Investigation done. Currently being fixed by Michael. He's creating a PR, i'll help with the STs part to enable the tests. We can close this task together with the following PR.