Fixed: Esc key propagation stopped by implied return

https://github.com/harvesthq/chosen/issues/390

coffee/lib/abstract-chosen.coffee

@@ -91,6 +91,7 @@ class AbstractChosen
         this.result_select(evt) if this.results_showing
       when 27
         this.results_hide() if @results_showing
+        return true
       when 9, 38, 40, 16, 91, 17
         # don't do anything on these keys
       else this.results_search()