-minor UI bug fixes

A fairground stall at dusk, a rack of wooden skittles with little bells on their crowns, and one beanbag in your hand. Drag back anywhere on the lane and let go. The direction of the pull sets the line, its length sets the power, and a dotted arc shows the whole flight before you commit, because that arc is drawn by the same routine that throws the bag. Where the bag lands on a skittle decides which way it topples, so clipping the right shoulder of a row can knock all five of them into each…