Update Scintilla to version 3.3.2
Update for new Scintilla styles
Merge branch 'scintilla-update'
Remove use of some of our own deprecated Scintilla wrappers

Remove most obvious calls to our very own deprecated Scintilla wrapper
functions sci_get_text(), sci_get_text_range() and
sci_get_selected_text().

Some calls are still left, but they either really benefit from these
functions or the fix would be more complex.