**BUG**
Concise problem statement:
It is not possible to export the Multi-Layer layer to PDF/SVG
Steps to reproduce bug:
1. Create/Load a PCB with Multi-Layer components
2. Press Document -> Export...
3. Try to choose the Multi-Layer layer
Results: Layer checkbox not available
Expected results: Layer checkbox available
Browser: Google Chrome
Thanks for a good product otherwise :)
//Hassanbot