Update OOjs UI to v0.1.0-pre (dcd343d471) for cherry-pick

New changes:
dcd343d PopupWidget: Toggle clipping -after- updating dimensions

Change-Id: I422acaf56f53051f79e5e9e437ea27b4a4218eae
Merge "Update OOjs UI to v0.1.0-pre (dcd343d471) for cherry-pick" into wmf/1.24wmf20