ViewFile causes duplication when inside a paragraph after editing and saving a document

[raphj]

Something like:

Hello

 [[image:attach:image.png||height="250"]]{{view-file att--filename="file.json" display="thumbnail" height="250"/}}

Bye

Causes duplication when edited. This is because the mechanism that auto cleans the html macro adds paragraph tags even though we already are in a paragraph and it confuses the WYSIWYG editor.