Autocomplete: identical string should be at the bottom

[bsiegert]

In the autocomplete box on the home page, we also add the text that the user typed as a suggestion, as a fallback before proper suggestions are loaded.

Once we do have at least one suggestion loaded, this fallback string (which is more likely to be invalid) should be at the bottom, not the top.

[bsiegert]

It looks like this is not so easy, since the typed text is inserted as a suggestion by the select2 widget itself.