Update OOjs UI to v0.1.0-pre (af97c1caec)

New changes:
7ebde47 Add indicator labels
7793a33 Add required indicator
2eb41b1 Allow indicators on option widgets
10ba7a5 Pass indicator information through pages to booklets
ef8b4a3 Bugfix: Allow dynamic registering of new tools
d1e4664 Revert "Bugfix: Allow dynamic registering of new tools"
c1f9ef2 Abstract page/outline item relationship
ba2faca Fixes for tool group re-population

Change-Id: I3a6352df96a409d4fb23a4732f2a4beda205a97a