LaTeX pdfs: Allow link format customisation

[bpedersen2]

Make the hyperref link color options configurabable.

This is a more complete alternative to #3277

[bpedersen2]

Adressed all comments.

[ThiefMaster]

hey, please don't use the"resolve conflicts" button on GitHub. it adds a merge commit which makes things rather messy when merging the actual PR. better to just manually do a git rebase and then force push.

or ignore the conflicts, we'll rebase anyway before merging a PR

[ThiefMaster]

hey, please don't use the"resolve conflicts" button on GitHub. it adds a merge commit which makes things rather messy when merging the actual PR. better to just manually do a git rebase and then force push.

or ignore the conflicts, we'll rebase anyway before merging a PR

[ThiefMaster]

I just rebased this PR to the latest master and fixed some things, but I noticed that "Color links (screen only)" also affects printing. I tested it with texlive 2018 (installing 2019 atm in case this fixes it).

Can you confirm that a printed PDF does not colorize links for you when using this option?

[bpedersen2]

Yes, seems like that depends on the pdf viewer used (I worked with Adobe Reader, but seems to have no effect with evince under linux).

[ThiefMaster]

I think I tried with sumatrapdf (and possibly foxit reader as well) and it was printed there...

[ThiefMaster]

Maybe it'd be better to remove that particular option since we have absolutely no control about which PDF viewer people use?