feat(select): added config option to show the clearbutton.

The clear button can now be always displayed with the option config.showAlwaysClear
Its default is false.

close #16

src/w11k-select.js

@@ -67,7 +67,8 @@ angular.module('w11k.select').constant('w11kSelectConfig', {
       marginBottom: '10px',
       /** static or manually calculated max height (disables internal height calculation) */
       maxHeight: undefined
-    }
+    },
+    showAlwaysClear: false
   }
 });
 
@@ -324,7 +325,7 @@ angular.module('w11k.select').directive('w11kSelect', [
             $timeout(function () {
               adjustHeight();
               jqDropDownMenu.css(visibility, 'visible');
-              
+
               if (scope.config.filter.active) {
                 // use timeout to open dropdown first and then set the focus,
                 // otherwise focus won't be set because element is not visible

src/w11k-select.tpl.html

@@ -1,6 +1,6 @@
 <div class="dropdown w11k-select">
   <div class="input-group select-toggle" w11k-dropdown-toggle="dropdown" ng-class="{disabled: config.disabled}">
-    <div class="input-group-addon deselect-all" ng-if="!config.disabled && !config.required && !isEmpty()" ng-click="deselectAll($event)">
+    <div class="input-group-addon deselect-all" ng-if="!config.disabled && (!config.required || config.showAlwaysClear) && !isEmpty()" ng-click="deselectAll($event)">
       <i class="fa fa-times icon-deselect-all"></i>
     </div>
     <div class="form-control" ng-disabled="config.disabled">

test/test.html

@@ -43,6 +43,7 @@
             <button class="btn btn-default" ng-click="staticConfig.disabled = !staticConfig.disabled">Toggle Disabled</button>
             <button class="btn btn-default" ng-click="dynamicConfig.required = !dynamicConfig.required">Toggle Required</button>
             <button class="btn btn-default" ng-click="dynamicConfig.multiple = !dynamicConfig.multiple">Toggle Multiple</button>
+            <button class="btn btn-default" ng-click="dynamicConfig.showAlwaysClear = !dynamicConfig.showAlwaysClear">Toggle Multiple</button>
           </div>
         </div>