GUI: close global access to 'InstrumentLibrary'
According to #404 (closed) InstrumentLibrary
is passed as argument only to classes that really need it:
MainWindow
--->InstrumentView
--->InstrumentListView
According to #404 (closed) InstrumentLibrary
is passed as argument only to classes that really need it:
MainWindow
--->InstrumentView
--->InstrumentListView