#674 Changed behavior of autocomplete selection.
#674 Changed behavior of autocomplete selection.

Users used to select the value in the dropdown with "enter". Since
"enter" is now used to submit, the value needs to be set when it is
selected in the dropdown list.

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