More preparations for layer oriented sample editor (!412) · Merge requests · mlz / BornAgain

m.puchner requested to merge preps3_LayerEditor into develop Oct 20, 2021

contains refactoring of unit to get rid of "undefined", add "other" for string-defined units
introduces DoubleLineEdit, a line edit which operates on a DoubleDescriptor
introduces DoubleSpinBox, a unit-aware spin box which operates on a DoubleDescriptor
add color property to LayerItem, which is necessary for the upcoming layer-oriented sample editor

More preparations for layer oriented sample editor