Powerpoint Viewfile Macro Cause Broken Page when Placed Inside User Macro Container

Adding Powerpoint Viewfile Macro inside a user macro breaks the page layout.

Steps to Replicate

1. Create a simple user macro (e.g: cp-expand):

   ## @noparams
   $body
   

2. Create a new page
3. Attach PPT or PPTX file
4. Insert cp-expand
5. Put the Office Powerpoint of the PPTX in Step 3 inside cp-expand
6. Save the page