DataMonitor Holography tab colors and cdb HOLO, CORR, NONE
right now, the Holography tab on DataMonitor shows all of the packets that arrive from HoloFFT backend whether or not they are part of a subscan. Change this behavior to make more easy for user to understand: In scan run, set cdb SUBSTYPE to NONE when subscan is finished and new subscan is not started yet.
- in GUI set color to pale gray for NONE
- Set HOLO to magenta thin line when it is not current packet
- Set CORR to cyan thin line when it is not current
- Set current packet to green thick line when it is current. then change to appropriate color after.