Hide _override_servicevars in Host Details page

[wp-perc]

Is your feature request related to a problem? Please describe.

Contents of custom var _override_servicevars are displayed in the Host page alongside with all other custom vars.
During time this can become a hindrance, because the number of overrides is bound to increase.
Can we find a way to remove this variable from the visualization?

Describe the solution you'd like

The obvious solution is to hide all overrides.

Describe alternatives you've considered

Use Protected custom variables to hide the values will result in a more compact view, but doesn't completely remove the variable itself.

Additional context

Icingaweb2 version 2.10.4

[nilmerg]

This is a director specific variable, right? Then it's the director's job to hide it. Possible once Icinga/icingaweb2-module-director#2445 is merged/finished.