Revert "Bug 944718 - [Cost Control] Broken access to usage widget from utility tray"

This reverts commit 31bbe151e0d92da77a86a3ae5edb6ca2643968e1.

This is the second time this patch has been backed out.
https://bugzilla.mozilla.org/show_bug.cgi?id=944718
Bug 925216: Add media info display to Gallery; change styles in Video to match

add 1rem more padding on the left for dt and dd elements