Update OOjs UI to v0.1.0-pre (db065e5a9f)

New changes:
8e1a057 ListToolGroup: Implement collapsible/expandable tools
35b58b5 Introduce ButtonInputWidget
9ca3b79 FlaggedElement: Fix PHP notice
db065e5 Localisation updates from https://translatewiki.net.

Locally, add the two new messages to the Resources.php manifest.

Change-Id: I27a925d3f8799fe1f5635cb41de95f5d555d1f5a
Merge "Update OOjs UI to v0.1.0-pre (db065e5a9f)"