Quality of life improvements (pano preview; open external URL)

[ireun]

In case of 360 degree photos 256px preview images are not enough. Here's how they look:

Which is basically pointless.
1024px pic looks like this in such case:

[tsmock]

@ireun : Can you sign your commit? See https://docs.github.com/en/authentication/managing-commit-signature-verification/about-commit-signature-verification for details on how to set it up:

• gpg
• ssh
• s/mime

I use gpg for signing my commits, but I have heard that ssh is easier to set up.

[ireun]

@tsmock done :)