gui: canvas update wip
gui: canvas update wip
gui: added checkered background to blank canvas
Merge branch 'master' into development
gui: small fix for the bandwidth VA
gui: overlay refactoring wip
Merge branch 'development'
gui: canvas wip
Merge branch 'development'
Merge branch 'master' of vpn.delmic.com:odemis
model: generalise ResolutionVA to TupleContinuous

allows to have any length and any type for the tuple
useful for semcomedi that needs floats of two tuples

also removes bandwidthVA which was never really used
semcomedi: add tranlation and scale to the scanner

warning: it changes the meaning of resolution
pretty untested (does scan something)