Updated mediawiki/extensions
Project: mediawiki/extensions/Echo  e4640e4d0a483fb22044764f82377a7661c97f66

Echo: Better support for non-default skins, as well as no Javascript

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