Image size in docx export

[cyberbaloo]

Bug Report

Problematic behavior When exporting a Docs document in Docx (Microsoft) format, images are larger than 100% of the page width.

Steps to Reproduce

1. Create a document.
2. Add text and images that are 2,500 pixels wide.
3. Export the document to docx.
4. And voilà!

Possible Solution Very large images should be reduced to A4 width, which would avoid having to resize them.