add selectable property to component objects

src/dom_components/model/Component.js

@@ -62,6 +62,9 @@ module.exports = Backbone.Model.extend(Styleable).extend({
     // Hide the component inside Layers
     layerable: true,
 
+    // Allow component to be selected when clicked
+    selectable: true,
+
     // This property is used by the HTML exporter as void elements do not
     // have closing tag, eg. <br/>, <hr/>, etc.
     void: false,

src/editor/model/Editor.js

@@ -409,6 +409,10 @@ module.exports = Backbone.Model.extend({
       model = $(el).data('model');
     }
 
+    if (model && !model.get("selectable")) {
+      return;
+    }
+
     this.set('selectedComponent', model, opts);
   },