Make chat 'windows' snap to grid

[mkeedlinger]

I'm not totally sure how to implement this yet, but they should have some sort of order to where they go

[janka102]

Possibly look at this https://jqueryui.com/resources/demos/draggable/snap-to.html

[mkeedlinger]

Very nice, but it would be great if it was more flowy, showed the grid in the background when moving a window, and wouldn't let windows overlap

[mkeedlinger]

this should also be compatible with #13.