gui: Roi now shown in settings as an immutable label
Merge branch 'master' of delmic-server.local:odemis
util: move clip() from overlay to util.rect_intersect

function can be used quite generally
also modify the arguments so they are tuples of 4 floats instead of 2 tuples of tuples of 2 floats

tests updated as well
gui: Added view controller for the Sparc analysis tab
gui: Added cancel button for Sparc acquisition
gui: Added Sparc ROI modification function
gui: update ROA overlay when ROA VA changes
Merge branch 'master' of vpn.delmic.com:odemis

apparently due only to space changes
Conflicts:
	src/odemis/gui/comp/overlay.py
	src/odemis/gui/dblmscopecanvas.py