Selectively show/hide "Sura" prefix in sura list

Currently, prefix is disabled for Spanish, Turkish and Uzbek.
Prefix is shown by default.

Also, changed the first tab's title with corresponding plural
form of the word (for English, Turkish and Uzbek).

Fixes #416.
Merge pull request #428 from ozbek/master

Selectively show/hide "Sura" prefix in sura list