Changed Component model property from `hiddenLayer` to `layerable`

src/dom_components/model/Component.js

@@ -50,7 +50,7 @@ module.exports = Backbone.Model.extend(Styleable).extend({
     editable: false,
 
     // Hide the component inside Layers
-    hiddenLayer: false,
+    layerable: false,
 
     // This property is used by the HTML exporter as void elements do not
     // have closing tag, eg. <br/>, <hr/>, etc.

src/dom_components/model/ComponentScript.js

@@ -6,7 +6,7 @@ module.exports = Component.extend({
     type: 'script',
     droppable: false,
     draggable: false,
-    hiddenLayer: true,
+    layerable: true,
   }),
 
 }, {

src/navigator/view/ItemsView.js

@@ -108,7 +108,7 @@ module.exports = Backbone.View.extend({
     var type = model.get('type');
     var tag = model.get('tagName');
     if( ((type == 'textnode' || tag == 'br') && hide) ||
-        model.get('hiddenLayer')) {
+        model.get('layerable')) {
       return false;
     }
     return true;