Made the cancel button work when moving the scannable using rotation or
motor position viewer.
Merge branch '8.32' of ssh://dascgitolite@dasc-git.diamond.ac.uk/gda/gda-core.git into 8.32
Merge branch '8.32' of ssh://dascgitolite@dasc-git.diamond.ac.uk/gda/gda-core.git into 8.32