QScintilla plugin: some work on upgrading to version 2.9 (#598) [ci skip].
QScintilla plugin: some work on upgrading to version 2.9 (#598) [ci skip].

mirams/opencor,Fairly/opencor,mirams/opencor,Fairly/opencor,mirams/opencor,mirams/opencor,mirams/opencor,Fairly/opencor,Fairly/opencor,Fairly/opencor