Odemis GUI indicates the SEM or Optical part is off if they are activated via CLI

[pieleric]

If the GUI is running, and simultaneously the user starts playing a SEM or optical detector, the respective part of the microscope will be technically active, while in the GUI the "OPTICAL" or "SEM" buttons indicate nothing is active.

Expected behaviour: in such a case the button should light up, (and nothing more should happen in the GUI).
Note: in general, it is not advised to use the CLI without good knowledge of the microscope and its limits, and more generally, when using the CLI it's expected that the GUI doesn't handle every case. Moreover, it's technically very hard for the GUI to "know" that another program is also accessing the backend.