The Popups extension uses a footer element so these rules clash with
that and probably other extensions.
To avoid this restrict the element to the skin.
Change-Id: Iac3aa8e600969a0feb0abeee745cd26592a594fd
We no longer need to keep this as a separate entry point now we do not
feature flag our print styles
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Change-Id: I6bf12980aa929e84f239931beb0a505809231830