The worst part about refilling a barter stall with coins is splitting all those coins in stacks. I think it'd be a lot better if holding ctrl while right clicking on a stack would bypass the flower screen and automatically pull out a stack the same size as the last one you pulled out (unless of course there's less than that in the stack you're splitting).
Yeah, I know all stuff with flower menus could use this, but it's the most painful with coins so can we get an ugly hack just for them please?