Plugins/autocompleter : Trim on user input

[dytryh]

If user input only white space chars, autocompleter not trim his input and trigger the server side script with a blank value.

If minchars is three and I fill my input with three white space, autocompleter request the server side script with no relevant data.

Trim before send http request seems to be a good issue to decrease network traffic and useless queries in server.

[scott.gonzal]

Interface is no longer supported; consider switching to ​jQuery UI.