Update OOjs UI to v0.1.0-pre (70f1886a35)

New changes:
c486e35 Add info icon and alert indicator
5928259 Add a 'ready' event to the window open sequence
d2f1933 Improve info and alert icons/indicators
6d78021 Defer window 'ready' event to let rendering happen
7705a94 Add focus method to SearchWidget
70f1886 Improve alert and required indicators

Change-Id: I58ae4c8154d45b34e2dcd404a5d8c3c9bbffd32f