Updated mediawiki/skins
Project: mediawiki/skins/Nimbus  4858c323017c47a2aa4c89b7d05640b9df5914f4

* Removed custom search placeholder message (nimbus-search)
* Made compatible with MW 1.23 (which also breaks backwards compatibility with any and all older versions due to the ResourceLoading module names)
* Removed error suppression functions
* Improved print view by giving some elements class="noprint"
* Sidebar now uses [[MediaWiki:Nimbus-sidebar]] instead of [[MediaWiki:Sidebar]]
* No more $wgTitle
* A bunch of other code quality & coding style fixes I've already forgotten about

Change-Id: I865855de801835cadb27986417e701ab8e1d8e90