Update OOjs UI to v0.1.0-pre (80f1797a5c)

New changes:
9e4d2c6 Remove @abstract from classes which can be instantiated
0b43fbe Button accessibility
f61558d Add confirmation dialog
f52f1f2 Localisation updates from https://translatewiki.net.
d6849d5 build: Update jscs and jshint config
d0a5670 ConfirmationDialog clean up
513cb9d Auto-hide menus by default

Local change:
Register OOUI confirmation dialog with windowFactory

Bug: 50955
Change-Id: I38f5bb63a125bbab1617cb8b419c4ef0339f6168
Merge "Update OOjs UI to v0.1.0-pre (80f1797a5c)"