remove Bootstrap keydown event listeners and re-add for non bootstrap-select selectors. $.off requires the selector matches exactly so the previous method didn't work. (#2308)

Author: caseyjhol

js/bootstrap-select.js

@@ -3125,8 +3125,13 @@
     return this;
   };
 
+  // get Bootstrap's keydown event handler for either Bootstrap 4 or Bootstrap 3
+  var bootstrapKeydown = $.fn.dropdown.Constructor._dataApiKeydownHandler || $.fn.dropdown.Constructor.prototype.keydown;
+
   $(document)
-    .off('keydown.bs.dropdown.data-api', '.bootstrap-select [data-toggle="dropdown"], .bootstrap-select .dropdown-menu')
+    .off('keydown.bs.dropdown.data-api')
+    .on('keydown.bs.dropdown.data-api', ':not(.bootstrap-select) > [data-toggle="dropdown"]', bootstrapKeydown)
+    .on('keydown.bs.dropdown.data-api', ':not(.bootstrap-select) > .dropdown-menu', bootstrapKeydown)
     .on('keydown' + EVENT_KEY, '.bootstrap-select [data-toggle="dropdown"], .bootstrap-select [role="listbox"], .bootstrap-select .bs-searchbox input', Selectpicker.prototype.keydown)
     .on('focusin.modal', '.bootstrap-select [data-toggle="dropdown"], .bootstrap-select [role="listbox"], .bootstrap-select .bs-searchbox input', function (e) {
       e.stopPropagation();