Fixed snippet creation from email-cta card's toolbar

no issue

- Glimmer components do not have a `.element` property so we need to set it manually because the editor currently reaches into card components to calculate the element's rect for selection when creating snippets

ghost/admin/lib/koenig-editor/addon/components/koenig-card-email-cta.hbs

@@ -17,6 +17,7 @@
     @moveCursorToPrevSection={{@moveCursorToPrevSection}}
     @moveCursorToNextSection={{@moveCursorToNextSection}}
     @editor={{@editor}}
+    {{did-insert this.registerElement}}
     as |card|
 >
     {{#if @isEditing}}

ghost/admin/lib/koenig-editor/addon/components/koenig-card-email-cta.js

@@ -114,6 +114,13 @@ export default class KoenigCardEmailCtaComponent extends Component {
         }
     }
 
+    // required for snippet rects to be calculated - editor reaches in to component,
+    // expecting a non-Glimmer component with a .element property
+    @action
+    registerElement(element) {
+        this.element = element;
+    }
+
     @action
     updateHtml(html) {
         this._updatePayloadAttr('html', html);