Offspecular instrument: do we need azimuthal angle?

Right now it is ignored in computation (const double phi_i = 0;) and cannot be set in instrument view of GUI, but added to ParameterTreeBuilder

Remove it from ParameterTreeBuilder?

changed milestone to %v22

added discuss in team! instrument & resolution labels

mentioned in issue #285 (closed)

assigned to @m.svechnikov

phi_f is fully determined by detector data. If an experimental scattering pattern has a symmetry axis at phi_f!=0, we would not adjust phi_f but phi_i. Therefore I think it makes sense to fully support phi_i.

mentioned in merge request !2895 (merged)

mentioned in commit a19a140b

closed with merge request !2895 (merged)