Autofocus in rotation calculation if needed
Merge branch 'master' of delmic-server.local:odemis
gui: update comments about BGRA conversion

realised this cost ~100 ms per image per view. So we might need to optimise it soon.
gui microscope: fix looking for sub-stages

Children only contains the children, not their internal roles.
So we need to rely on their own role.
Merge branch 'master' of vpn.delmic.com:odemis