Bring back dir=auto in the search bar input
Bring back dir=auto in the search bar input

This may not be ideal for RTL UIs but we'll keep it like that until we can get some insight from native speakers of RTL languages.

Refs #74.

Tatoeba/tatoeba2,Tatoeba/tatoeba2,Tatoeba/tatoeba2,Tatoeba/tatoeba2,Tatoeba/tatoeba2