Update OOjs UI to v0.1.0-pre (497baca586)

New changes:
6eed7c7 Add demo of auto-disabling toolgroup
8f066a6 Localisation updates from https://translatewiki.net.
58021ec Add clearFlags method to FlaggableElement

Change-Id: I34569dd25ec598a850736ce0cb377f309ca97000