Moved ExternalProperty files to Models

See merge request !86

Refactor Model: distribution items

See merge request !85

Redesign mask editor so it shows already while editing what you will get (WYSIWYG)

See merge request !84

fix project reading error introduced with global renaming of "OffSpecInstrument"

See merge request !83

This removes the necessity of ROI to implement the "show" button, to see the masking effects.

In a further step the mask presenter (which uses ROI functionality) could be removed, which was the motivation for the refactoring/redesign in the context of "remove ROI".

fix project reading error introduced with global renaming "OffSpecInstrument" -> "OffSpecularInstrument"

Make BeamDistributionItem::setDistributionGroupItem a template to reduce the need for casting and improve type safety

Refactor model: SymmetricDistributionItem

See merge request !82

Refactorings no. 2 for the upcoming removing of "region of interest" (ROI)

See merge request !81

add unit tests as well

necessary for later refactoring

was not in use at all, only in tests. Only roiIndex and detectorIndex shall be used

* remove indirection class SimulationArea
* docu
* adapt tests

Remove unnecessary includes; remove dependency of error reporting on main window

See merge request !80

Refactor for removing RegionOfInterest

See merge request !79

the call is contained in the following call to isMasked()