Footnote macro produces inline content in standalone mode

Steps to reproduce:

1. Create a new document and edit it in WYSIWYG mode
2. Insert a footnote macro with some content (in an empty line/the empty document).

Expected result:

The footnote and the list of footnote are separate macro widgets and it is possible to insert text between them.

Actual result:

There is one big footnote macro widget displayed which is not editable. When you insert a paragraph after the footnote in the source view, this macro widget even encloses this paragraph.

This is because the footnote macro produces a <sup>-tag that is auto-wrapped in a paragraph by CKEditor and this wrapping swallows the closing macro marker. The only "easy" solution seems to be to add a wrapping paragraph to the footnote macro output when it is used in standalone mode.