Show empty value for Menu and display an asterisk next to the default menu (fixes #391)

engines/common/nucleus/particles/menu.yaml

@@ -27,8 +27,10 @@ form:
       label: Menu
       description: Select menu to be used with the particle.
       default: ''
+      selectize:
+          allowEmptyOption: true
       options:
-        '': -- Select Menu --
+        '': Use Default Menu
 
     startLevel:
       type: input.text
@@ -46,4 +48,4 @@ form:
       type: input.checkbox
       label: Mobile Target
       description: Check this field if you want this menu to become the target for Mobile Menu and to appear in Offcanvas
-      default: 0
+      default: 0

platforms/common/application/ui/selectize.js

@@ -1536,7 +1536,7 @@ var Selectize = new prime({
 
     registerOption: function(data) {
         var key = hash_key(data[this.options.valueField]);
-        if (!key || this.options.hasOwnProperty(key)) return false;
+        if ((!key || this.options.hasOwnProperty(key)) && !this.options.allowEmptyOption) return false;
         data.$order = data.$order || ++this.order;
         this.Options[key] = data;
 

platforms/common/js/main.js

@@ -10502,7 +10502,7 @@ var Selectize = new prime({
 
     registerOption: function(data) {
         var key = hash_key(data[this.options.valueField]);
-        if (!key || this.options.hasOwnProperty(key)) return false;
+        if ((!key || this.options.hasOwnProperty(key)) && !this.options.allowEmptyOption) return false;
         data.$order = data.$order || ++this.order;
         this.Options[key] = data;
 

platforms/common/templates/forms/fields/menu/list.html.twig

@@ -2,6 +2,7 @@
 
 {% block options %}
     {{ parent() }}
+    {% set current = gantry.menu.getDefaultMenuName() %}
     {% for key in gantry.menu.getMenus() %}
         {% set text = key|capitalize %}
         <option
@@ -10,6 +11,6 @@
                 value="{{ key|e }}"
                 {# non-gloval attribute structures #}
                 {% if field.options.disabled in ['on', 'true', 1] %}disabled="disabled"{% endif %}
-                >{{ text|e }}</option>
+                >{{ text|e }}{{ current == key ? ' *' : '' }}</option>
     {% endfor %}
 {% endblock %}