change parameters of sobel
Merge branch 'master' of github.com:CVVisualPSETeam/CVVisual
Merge branch 'master' of github.com:CVVisualPSETeam/CVVisual
fix segfault bug in context of QApplication and add finalShow()
Merge branch 'master' of github.com:CVVisualPSETeam/CVVisual
Merge branch 'master' of github.com:CVVisualPSETeam/CVVisual
fix typo that prevents compilation.

Please execute test.sh before commiting!
Merge branch 'master' of github.com:CVVisualPSETeam/CVVisual

Conflicts:
	src/qtutil/matinfowidget.cpp
make accordion and collapsable use unique_ptr instead of owning refs
Merge branch 'master' of github.com:CVVisualPSETeam/CVVisual

Conflicts:
	src/view/defaultfilterview.cpp