Added:
- Functionality to SGMBeamline to set a focus pair for X-Y and a flag to track Y based on X. Tested and appears to work.
- CheckBox and button to SGMSampleManipulatorMotorGroupView to set a focal position and toggle the tracking.
- Added some checks to make sure that measure position and transfer position disabled focal tracking before attempting moves.

Altered:
- Changed behavior of AMSampleCamera to have a moveXZ() function for motors. Old style always pushed on all four motors, which doesn't work if we're trying to grab signals and track Y based on X. There were two clear cut cases where an X-Z movement was really what was needed as opposed to a full XYZR movement.