Update Estonian translation (#331)

* Chinese (Hong Kong)
* Urdu
* Tibetan
* Basque
* Latvian
* Uighur
Fix race condition for #358

(Plus some minor UI tweaks)
CSS formatting cleanup
Further improvement for #451
Slight tweaks for #358
Update Latvian translation (#331)

Remaining translations:
* Chinese (Hong Kong)
* Urdu
* Tibetan
* Basque
* Uighur
Merge branch 'master' of github.com:cryptocat/cryptocat
Preparing some additional tor stuff