🐛 Fixed pasting html into a KoenigBasicHtmlInput

refs https://github.com/TryGhost/Team/issues/1245

- Several inputs where dismissing the content when pasting HTML without the expected input tag
- The inputs where: the caption of the feature image; the email footer; the caption in the bookmark, code, embed, gallery, image, video cards; the callout card title; the product card header and description; the toggle header
- This makes sure the wrapper html tag is the expected one.

Co-authored-by:
- Kevin Ansfield (@kevinansfield)

ghost/admin/lib/koenig-editor/addon/components/koenig-basic-html-input.js

@@ -363,6 +363,11 @@ export default Component.extend({
         }
         // -----------------------------------------------------------------
 
+        // convert first section to the expected tag type (might be a heading, blockquote, etc)
+        if (pastedPost.sections.head) {
+            pastedPost.sections.head.tagName = this.defaultTag;
+        }
+
         // same as default
         editor.run((postEditor) => {
             const newPosition = postEditor.insertPost(position, pastedPost);