This functionality is off by default, behind a configuration variable
($wgVectorResponsive) by popular developer demand.
CSS/LESS code by James Hare, with tweaks and testing by Jack Phoenix.
Bug: T46387
Change-Id: Ib611357bbce739b1d193abaf89c228ba52613d6a
Style modules currently added through addModuleStyles default
to being in the head ("top" position). This is an unhealthy default,
since only critical styles that are needed at pageload should be
in the head. In order to be able to switch the default to "bottom",
existing module positions have to be defined explicitly.
Bug: T97410
Change-Id: Ic3d188fe5a833a97027a06cd62c4acef691669bf