Much of this was hidden so far, but this brings them back into action.
It's perhaps not ideal, but it's the best I could come up with.
Bug: T106463
Change-Id: Ia33e2ac0aed0ffe8d0d96d8c3462b9d23c10bba2
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