Update OOjs UI to v0.1.0-pre (3d8475c0b3)

New changes:
feba6af Remove unused CSS classes
58af913 Remove direction style attribute
7463080 Restyle agora theme for mobile after window refactor
5708bdf Make scrolling in PanelLayout smoother on iOS
96b89c2 demos: Add right-aligned menu in toolbar demo

Change-Id: If38bbe6a7bc6c1452d2c56397344a3b75f5e46d5
Merge "Update OOjs UI to v0.1.0-pre (3d8475c0b3)"