gui: added enable method to ToolBar which allows for the enabling en disabling of ToolBar buttons
gui testcase: small udates. The slider test case fails *only* when run through runall.py.
gui: small diagram update
gui: small PointSelectOverlay enhancement
gui: Added PlotViewport support to XRC
Merge branch 'master' of delmic-server.local:odemis
pigcs: use ontarget info to decide if a closed-loop actuator is done moving
pigcs: start closed loop support for simulator