column: Add the .narrow, .medium and .wide style classes

These classes are added automatically depending on the reached
threshold: .narrow when the column is so narrow it allocates all its
size to its child, .wide when the child won't be allocated more space as
the column grows, .medium in between, and none of these when there is no
child or it isn't visible.
12 jobs for column-style-classes in 29 minutes and 29 seconds (queued for 28 minutes and 39 seconds)