[NEW FEATURE] Enable VIEW only version of MMA in OMERO by using OMERO permissions

[strambc]

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

The current behavior does not allow the distinction between the activity of Microscopy Users vs. Microscopy Custodians.
Thus while Microscopy Custodians should be allowed to create and edit Microscope.JSON files (i.e. hardware configurations), in most cases regular Microscope Users should not be allowed to modify the hardware configuration of a given microscope they are using.
In this scenario, it would be useful to introduce a feature that would allow us to distinguish between a read-only vs a read-and-write behavior of Manage Instrument.

Describe the solution you'd like
Ideally, regular Microscope Users would have only access to a "read-only" version of Manage Instrument while Microscope Custodians would have access to a "read and write" version.
This could be achieved by introducing an initial window offering the option of entering the App in Editor mode vs. Viewer mode.

Describe alternatives you've considered
Another alternative would be to take advantage of OMERO permissions and allow regular users access to Manage Instrument only in read-only mode while administrators would have access to a read-and-write mode.