Update OOjs UI to v0.1.0-pre (12b66051ff)

New changes:
0bcb0a1 Style mediawiki theme checkbox
227aefa paralell -> parallel
51ee44c Remove nonfunctional $icon/$indicator code from OptionWidget
735ba0e Use Object.prototype.hasOwnProperty where appropriate
324b8cb Localisation updates from https://translatewiki.net.

Change-Id: I2919d80b9ea5231f45b1e14ae1393a0f7665ec0c