Add Tests if MuEditor is completly removed when flag is not set

[Mosch0512]

There is a build flag for MuEditor if set MuEditor is available.
The editor should only be available for Server Admins.

We need to add tests to ensure when building without Editor flag that nothing leaked through.

[guptapiyush16]

I would like to work on it, kindly assign to me

[Mosch0512]

Love it go ahead