Mode selection dialog should take requires modes into account

[lwrage]

Please describe the problem your proposed feature would address
To run the flow latency analysis for one SOM, it is necessary to select a mode for each modal component. If a component has requires modes its mode is given determined by the mode of its container.

What is the impact of the problem?
It is tedious to manually perform unnecessary mode selections and it is possible to select an impossible mode combination.

Describe the solution you'd like
Components with requires modes should be skipped, or their mode should be selected automatically (and not be changeable).

Describe alternatives you've considered
none

Additional context
none