Prevent double submitting for autocomplete. Bug on submitting autocomplete by key (enter, tab and etc.)

The problem of the editablefields field, when you try to select some result of autocomplete by keyboard key, you can see that form was submitted two times and don't work as you expect.

We need to process autocomplete only when field was actually changed.

How it currently work with autocomplete:
1) Type some word in field
2) Select result by arrows
3) Hit tab or enter
4) editablefields.js submits form
5) editablefields.js sets value to the textfield
6) editablefields.js again submits form
7) as result you will see results of the first submit