Multiple abbr.search-choice-close

[francescopellegrini]

When allow_single_deselect is true, there is no check whether or not abbr.search-choice-close element has already been added, thus ending up appending multiple copies of it.

Fix @l468, L653

var selectedOptionSpan = this.selected_item.find("span").first();
var maybeAbbr = selectedOptionSpan.siblings("abbr");

if ( maybeAbbr.length > 0 )
  maybeAbbr.detach();

selectedOptionSpan.after("<abbr class=\"search-choice-close\"></abbr>");

[pfiller]

Thanks, @MrPelle