Added a new ISI_OFFLINE state to the sei manager guardians that has the ISIs in Ready and HEPI Isolated. This state is mainly used while the sei team is testing and not for normal operation. To get to ISI_OFFLINE I added a couple of transition states from DAMPED that will turn Off the ISI damping loops, and then turn them back on before entering DAMPED again. (HAM and BSC graphs attached)

Tested yesterday on ITMX and HAM5. Loaded the new code into all of the managers today.