Exported (notes/wb) from breakout difficult to view

[antobinary]

Describe the bug
We now seem to add the exported presentation as a shape rather than opening it. It looks quite different than a normal presentation, can't do fit-to-width, need to manually zoom in to be able to read.

To Reproduce
Steps to reproduce the behavior:

1. Create breakouts with the option to export shared notes.
2. End the breakouts, wait for the export to finish
3. From the + button set the exported pdf to be the active presentation

Expected behavior
Easier to set in fit-to-width / or at least no massive margin appearing.

Actual behavior
Looks like a shape on a canvas, not like a new pdf opened.

Screenshots

BBB version:
BigBlueButton 3.0.0-alpha.6