(2) Fixed bugs in the coregistration algorithms and functions; Added 2 new coregistration methods (invert and expand).
Fixed updateMenuOptions to work with all the recent menu button additions (coreg buttons, etc).
(3) Fixed a bug where the overlay would not show correctly if there were no mask images; Fixed a bug where the patient tform property was not being resized when slices were added or removed; Fixed a potential bug where the menu options were not being updated after the cancel button was pressed.
Fixed an error where when calculating absolute volume, "signal/max signal" could be greater than 1, meaning the voxel had more than 100% gas. It now limits the ratio to 100%.