Add a close button to the channel rack

[Mikekey]

Since the dawn of mankind, people have been clicking the top-right X-button to close windows, so naturally you reach for that button when you want to close a window, but alas, it's not there on the Channel Rack. ALL other windows in FL Studio have the X-button that closes down the window, but the Channel Rack does not. This is something that has annoyed me for as long i have been using FL.
It's a very small thing to change, i see no reason why it doesn't have one. Having one would make it faster to get the window out of the way.

Thanks Devs.