Overhaul instrument view
The instrument view has been reworked, especially the following things have been done:
- the functionality of
GUI/Views/InstrumentWidgets/InstrumentViewActions.*
has been moved toGUI/Views/InstrumentWidgets/InstrumentSelectorWidget.*
and simplified in the process - the functionality of
GUI/Views/InstrumentWidgets/InstrumentViewToolBar.*
has been moved toGUI/Views/InstrumentView.*
and simplified in the process - the items in the toolbar of the view and the items in the context menu of the instrument selector have been merged. The usability has been improved by using separate buttons for the different instrument instead of the tool button menu which was used before (which also led to code simplification).