Overhaul attachments handling
A few changes that were discussed on the fediverse before and other issues as well.
- Limit max shown 'thumbnails' while leaving an option to see other attachments too.
- Tell user that going past 4 attachments might not be visible on non-pleroma instances
- Basic attachment modals that could be operated on click/tap (one tap opens an image fit to screen so no scrolling and no stretching, another tap closes it again, no need for a gallery yet), or hover (hovering on image shows a bigger preview, should also do it with hidden attachments (but probably not nsfw? sounds risky if you hover your mouse over nsfw link when boss walks past w), this stuff should be configurable.
Debatable:
- Revise how attachments are displayed, flex that takes a different amount of space depending on amount/sizes of images can cause jumping, fixed size attachment 'thumbnails' would remove this issue.
- Replace [IMAGE] etc links with gray icons instead, not sure how NSFW should be done so maybe not for this issue.