colored arrows

I see that MRectangles in MarvinJS can be colored, but it seems to me that MPolylines (reaction and resonance arrows) cannot. We color reaction arrows that should be resonance arrows, and vice versa, as part of our feedback to students doing mechanism problems. If you were not already planning to add this feature, please put it on the request list. If you were already planning to add this feature, please raise its priority somewhat.

I have added it to the request list.

Efi

Thanks. This request is higher priority to me than some of the others I have requested, because I use the colors of the arrows to convey feedback to the students. Given that you have already implemented colors in MRectangles, it seems to me that it should be fairly simple to extend them to MPolylines.

While we're at it, let's color electron-flow arrows as well.