Had to separate zoom and translate matrices to stop the zoom being
applied to itelf. This also required adding separate get/set functions
for each matrix and a GetcombinedMatrix() funtion.
Added those functions ot other files where needed ut may be wrong. Need
to look at export.cpp
Also changed the mouse move and press events to make translation work.
Improves minor issues with frame queue implemented in earlier commit. Also links
ViewerWindow with the queue and a separate timer to make it much smoother.
Implements an extra widget to display images on a separate monitor. Both
viewers have separate display color controls since different monitors may
conform to different standards/transforms.
itsmattkc