Add `remove` listener on panel items. Fixes #1081

src/panels/view/PanelView.js

@@ -4,14 +4,16 @@ var ButtonsView = require('./ButtonsView');
 module.exports = Backbone.View.extend({
   initialize(o) {
     const config = o.config || {};
+    const model = this.model;
     this.config = config;
     this.pfx = config.stylePrefix || '';
     this.ppfx = config.pStylePrefix || '';
-    this.buttons = this.model.get('buttons');
+    this.buttons = model.get('buttons');
     this.className = this.pfx + 'panel';
-    this.id = this.pfx + this.model.get('id');
-    this.listenTo(this.model, 'change:appendContent', this.appendContent);
-    this.listenTo(this.model, 'change:content', this.updateContent);
+    this.id = this.pfx + model.get('id');
+    this.listenTo(model, 'change:appendContent', this.appendContent);
+    this.listenTo(model, 'change:content', this.updateContent);
+    model.view = this;
   },
 
   /**

src/panels/view/PanelsView.js

@@ -6,11 +6,18 @@ module.exports = Backbone.View.extend({
     this.opt = o || {};
     this.config = this.opt.config || {};
     this.pfx = this.config.stylePrefix || '';
-    this.listenTo(this.collection, 'add', this.addTo);
-    this.listenTo(this.collection, 'reset', this.render);
+    const items = this.collection;
+    this.listenTo(items, 'add', this.addTo);
+    this.listenTo(items, 'reset', this.render);
+    this.listenTo(items, 'remove', this.onRemove);
     this.className = this.pfx + 'panels';
   },
 
+  onRemove(model) {
+    const view = model.view;
+    view && view.remove();
+  },
+
   /**
    * Add to collection
    * @param Object Model