Update OOjs UI to v0.1.0-pre (944c47c5fe)

New changes:
36ae086 Use a pollNode for every transplanted stylesheet, not just external ones
a1771ed Support nested style transplantation
8c60d3c Create a combo box widget
944c47c Update oojs to v1.0.12

Change-Id: I800bb36b80d04e165e9fa9b00ed8a5223f2d954b