Support for PDF exporting

[SoCuul]

It would be nice to have the option to export PDF files, without having to save them as images, therefore rasterizing the document and losing metadata.

[xhruso00]

File->Export to... can export PDF.

[SoCuul]

That's good to know. However, it would be much more clear that this functionality is available if on right click there was an option to "Export as PDF", just like there is the "Save image as" context menu option.