[Feature Request] Export PDF colouring

[AllanFerencz]

Feature Description
Currently there is no way to alter the colour for 'Export PDF` that is separate from current theme (At least I couldn't find anything). PDF exports with a white background. This is a problem for readability as noted below in the screenshots.

When exporting I need change to the light mode and export as it's hard to read Dark mode export. It's also a problem with the accent colours. Any of the light ones on white look hard to read.

Dark mode PDF

Light mode PDF

Let me know if that makes sense. Some alternative solutions.

1. Make default export the light mode theme selected.
2. Make the PDF background dark (I would personally still need to export in light then but at least it would be consistent.

Here are some more examples of darkmode export

[AnubisNekhet]

afaik this is an issue with the default theme as well, though i've made some adjustments to make it more readable in dark mode. the major problem is that the white background cannot be changed with any kind of CSS.

If anyone has any idea on how to change the background, then please feel free to make a PR.

[AnubisNekhet]

Implemented with v1.3.0