Remove wizard composer static id

This causes an issue if multiple composers are used in a single step

assets/javascripts/wizard/components/wizard-field-composer.js.es6

@@ -3,8 +3,7 @@ import EmberObject from "@ember/object";
 
 export default Ember.Component.extend({
   showPreview: false,
-  elementId: "reply-control",
-  classNameBindings: ["showPreview:show-preview:hide-preview"],
+  classNameBindings: [":wizard-field-composer", "showPreview:show-preview:hide-preview"],
   
   didInsertElement() {
     this.set('composer', EmberObject.create({

assets/stylesheets/wizard/custom/composer.scss

@@ -42,11 +42,11 @@
   }
 }
 
-#reply-control.show-preview .d-editor-textarea-wrapper {
+.wizard-field-composer.show-preview .d-editor-textarea-wrapper {
   display: none;
 }
 
-.custom-wizard #reply-control .toggle-preview {
+.custom-wizard .wizard-field-composer .toggle-preview {
   margin-top: 20px;
 }