This provides some rudimentary styling support to make Echo usable
with the Modern skin.
It also fixes the Notifications special page so it is styled
correctly in Modern, CologneBlue, or with Javascript turned off.
Also some more tweaks for Monobook skin.
Retiring the 'feedback' link from the special page, per PM.
Bug: 47932
Change-Id: I633a93a78f5a78d0642a3a059fa6f7208f99cec4
With this change we will no longer be relying on JS for the badge
functionality. This will prevent the flash of unstyled content,
and allow wikis to locally override the styling (since the unread
class is now applied immediately).
I also went ahead and made the badge styling more closely match the
talk page message alert styling per Vibha.
Also removed the old full link optional behavior since we weren't
using it, and it would have been a pain to maintain.
Bug: 48165
Bug: 48001
Change-Id: Ie85d66afd5181d487d0bb2776ae14b121ea50d88
