Make sure load extruder 2 has load option
Fixe bug with canceling probing then restarting right away
issue: MatterHackers/MCCentral#4669
Way to babystep Dual extruder Z offset
Fixed a bug with timing of injecting regex replacements
moved T (extruder) tracking to queued command stream
check that we have loaded filament on extruder 1
issue: MatterHackers/MCCentral#5029
Don't do actual switch of extruders until there is a pending move command