Thats what i have done, just to keep things simple i always use a lot of groups so i can shut off basicly all code i dont work with at any time.
But when having to work in several groups simultaneously, finding vital nested events while scrolling can sometimes be a bit time consuming ^^; Or am i just missing something that keeps things more clear in the view? Having to open the groups and subgroups to get to the event im after can be just as time-consuming if the event is deeply hidden.
Having a nested nested group being able to color red / green / blue or whatever would save a ton of time for me, but i realize it might not be of very major interest to the game creator community as a whole so other more vital updates should take priority ^^
I just figured if it was easy to implement, i would love it dearly.