Change fix, instead of hacking in a filter clear every time, fix the root...

Change fix, instead of hacking in a filter clear every time, fix the root cause by only selecting elements for that dropdown instance

app/assets/javascripts/gl_dropdown.js

@@ -331,7 +331,7 @@ GitLabDropdown = (function() {
             if (_this.dropdown.find('.dropdown-toggle-page').length) {
               selector = ".dropdown-page-one " + selector;
             }
-            return $(selector);
+            return $(selector, this.instance.dropdown);
           };
         })(this),
         data: (function(_this) {
@@ -543,8 +543,6 @@ GitLabDropdown = (function() {
       this.options.opened.call(this, e);
     }
-    if (this.options.filterable) this.filter.filter();
-
     return this.dropdown.trigger('shown.gl.dropdown');
   };