[BREAKING CHANGE] Show matched string in LanguageSearchWidget results

If the language is matched on something other than name, that
is shown on the right hand side, and in either case the matching
substring is emboldened.

Breaking change:
* Introduces new LanguageResultWidget class

Change-Id: I6e0e67ce8da8fdb8a480a7bf2bce557e7b4e0ff1
Update OOjs UI to v0.1.0-pre (301887f487)

New changes:
d641133 Add Agora theme dialogs

Change-Id: Ia6f31ba690f99cd724f56450d824da9b623a7bdc
Merge "[BREAKING CHANGE] Show matched string in LanguageSearchWidget results"