Fix layout-padding css

Adds a `,` which was missing in 5caa22b2c444485b3d340cda662d8808b1fc381d when `layout-padding` was readded. Also removes a comment saying `layout-padding` is depreciated since it has been readded.
@gkalpak Are you saying the just the `layout-padding` part should be removed or the couple of lines under it for margin too? I think at least the `layout-padding` for that should have a rule similar to the margin one under it. I must have overlooked it when I did this.