[UI Feature Request]: Add Multicut second group selection to right click (control+mousedown2 )

[mtakeno]

When using the multicut tool, toggling between group selection (a.k.a. "blue team" vs. "red team") requires mouse movement between imagery and layer control panel/ graph tab. Having one group bound to left mouse button and other group bound to right mouse button (and having an option to disable / select between toggling behavior and fixed group behavior bound to mousedown1/2) might save repetitive mouse movements.

[ceesem]

Alternatively, a key command to toggle sides and a clear interface element displaying which team is selected. Currently the only way to tell is if you hover over EM, which is not always displayed.