Clear cached stuff in property view

src/style_manager/view/PropertyCompositeView.js

@@ -123,5 +123,12 @@ module.exports = PropertyView.extend({
     }
 
     return value;
+  },
+
+  clearCached() {
+    PropertyView.prototype.clearCached.apply(this, arguments);
+    this.$input = null;
+    this.props = null;
+    this.$props = null;
   }
 });

src/style_manager/view/PropertyFileView.js

@@ -51,6 +51,12 @@ module.exports = PropertyView.extend({
     this.setValue(this.componentValue, 0);
   },
 
+  clearCached() {
+    PropertyView.prototype.clearCached.apply(this, arguments);
+    this.$preview = null;
+    this.$previewBox = null;
+  },
+
   setValue(value, f) {
     PropertyView.prototype.setValue.apply(this, arguments);
     this.setPreviewView(value && value != this.model.getDefaultValue());

src/style_manager/view/PropertySliderView.js

@@ -56,5 +56,10 @@ module.exports = Property.extend({
     if (!this.model.get('showInput')) {
       this.inputInst.el.style.display = 'none';
     }
+  },
+
+  clearCached() {
+    Property.prototype.clearCached.apply(this, arguments);
+    this.slider = null;
   }
 });

src/style_manager/view/PropertyView.js

@@ -473,7 +473,14 @@ module.exports = Backbone.View.extend({
     this.setValue('');
   },
 
+  clearCached() {
+    this.clearEl = null;
+    this.input = null;
+    this.$input = null;
+  },
+
   render() {
+    this.clearCached();
     const pfx = this.pfx;
     const model = this.model;
     const el = this.el;