fix(searchEnabled): Prevent searching when disabled

Previously, even when search-enabled was set to false, users could
still type in text and filter the list. This made disabling the search
feature pointless.

This fix prevents text entry to the search input and thus disables
filtering.

Fixes angular-ui#1658

Author: user378230

src/uiSelectController.js

@@ -613,7 +613,10 @@ uis.controller('uiSelectCtrl',
       var tagged = false;
 
       if (ctrl.items.length > 0 || ctrl.tagging.isActivated) {
-        _handleDropDownSelection(key);
+        if(!_handleDropDownSelection(key) && !ctrl.searchEnabled) {
+          e.preventDefault();
+          e.stopPropagation();
+        }
         if ( ctrl.taggingTokens.isActivated ) {
           for (var i = 0; i < ctrl.taggingTokens.tokens.length; i++) {
             if ( ctrl.taggingTokens.tokens[i] === KEY.MAP[e.keyCode] ) {