Merge remote-tracking branch 'dkazakov/preserve-lightness-brush'
- Conflicts:
- libs/brush/CMakeLists.txt
- libs/brush/kis_brush.cpp
- libs/brush/kis_gbr_brush.cpp
- libs/brush/kis_imagepipe_brush.cpp
- libs/brush/kis_imagepipe_brush.h
- libs/brush/kis_predefined_brush_factory.cpp
- plugins/paintops/libpaintop/forms/wdgclipboardbrush.ui
- plugins/paintops/libpaintop/kis_brush_chooser.cpp
- plugins/paintops/libpaintop/kis_brush_chooser.h
- plugins/paintops/libpaintop/kis_custom_brush_widget.cpp