expand/collapse afunction for sticky thread section at the top of a board

[jilly]

Some of my boards can end up with a huge list of 'sticky' threads at the top of a board, and while one solution would be to put all the board's stickies into one thread, on some boards each sticky is very long, due to the topic, and we found that made it harder and more difficult to try and read and find things, and people preferred the stickies broken into different topics. But now we end up having to scroll down past 10-20 stickies to get to the board posts.

I thought it would be a nice feature if there was an 'expand/collapse' arrow next to the sticky thread sections, so that they could be collapsed /expanded at will.