Issue description
Add a procedure block that makes your hand move like you were breaking or placing blocks, but doing nothing. This could be useful with custom ways to place blocks because the block appears in the place, but your hand stays idle when placing it. It's actually very awkward and annoying, so I think a hand animation procedure will be very fancy.
Although our feature list for 1.9.0 is complete, I have decided to squeeze this one in 1.9.0 as this was requested a few times and this time I actually found a way to do this so in 1.9.0 you will have swing main and swing off hand procedures.