Removed the grid module and moved the used parts it into our own CSS,
eliminating around 75% unused CSS in turn.
(cherry picked from commit 286268c9155c9e0b3a3aa0a18675111e5b744a5b)
Remove this CSS-only module, which gives a nice reduction in CSS size.
Should look exactly like before.
(cherry picked from commit 4e547822f348c2963e0db33135b45d43dfc58df8)