Autocomplete loses item selected via keyboard in CTools dialog

When adding a "Content Item" widget to a page, the "Piece of Content" field has an autocomplete. If you use the keyboard to navigate to the item you want and then press ENTER, it will Save the widget settings before the autocomplete has a chance to fill in the input. If you click the "Settings" button again, you'll see that it has the text you typed, rather than the full title you selected from the autocomplete options.

There is already a patch in the CTools queue to fix this:

#581670: Autocomplete loose selected item after selection

With this patch, pressing ENTER the first time will select the autocomplete item. Then if you press ENTER again, it'll save the settings.