Require re-saving cuts before calibration if beam settings have been changed

[tpitkanen]

Problem

ToF calibration can be accessed with stale .cut files if beam settings are changed without generating new cuts.

(This is an old bug. This issue was based on an email bug report.)

Reproduction

1. Create a request
2. Import measurement data
3. Make selections and save cuts that are RBS
4. Change beam settings (e.g. beam element)
5. Apply settings
6. Do Detector > Calibration > Execute
7. Observe that affected RBS cuts have the old beam in their name

[tpitkanen]

Workaround in c015910

[tpitkanen]

This could be solved by keeping track of cut files and their staleness. There are probably other good uses for such feature.

Offering an option to re-save cuts for all measurements that use default settings after changing beam settings is a feasible option too.