Emulate the darkening/ lightening lenses by semi-transparent black/white fills
Emulate the darkening/ lightening lenses by semi-transparent black/white fills

Change-Id: Ie5303c5a638238ade16bb295b952002cedffe9f3

LibreOffice/libfreehand,LibreOffice/libfreehand,LibreOffice/libfreehand,LibreOffice/libfreehand