Redmine: #2305

Redmine: #2305

Redmine: #2305

Wrap ScientifcSpinBox into custom editor

Finally put TOF and q-defined reflectometry in operation

And provide factory function to create it from SpecularDataHandlerAng

To suppress warning on win

SpecularDataHandler introduced

It also provides a faster intensity normalization for Specular

This partially reverts commit 69bb6f9a.
Namely, PyPersistence/BeamAngularDivergence reference data
was returned to its previous state

Fix uncaught exception in GUI during real time tuning (issue #2304)

Add interference function for twin particles

Extending internal machinery to the case of q-based specular simulations