* Make the "mark media as sensitive" button more obvious in web UI

* Use eye-slash icon instead of eye icon to mean "hide"

- 3 items per row instead of 2
- Use blurhash for previews
- Animate/hover-to-play GIFs and videos
- Open media modal instead of opening status
- Allow opening status instead with ctrl+click and open in new tab

Fixes #1015

Fixes detailed status column

* Add blurhash

* Use fallback color for spoiler when blurhash missing

* Federate the blurhash and accept it as long as it's at most 5x5

* Display unknown media attachments as blurhash placeholders

* Improve style of embed actions and spoiler button

* Change blurhash resolution from 3x3 to 4x4

* Improve dependency definitions

* Fix code style issues

They will be enabled if the input has focus

Support abbr, del, pre, blockquote, code, strong, b, em, i, and h1…h5
HTML elements in remote statuses, add corresponding CSS.

Port d763d39d26 to glitch-soc

Regression: only one warning at a time