changed default pinned count to 5 to preserve default behavior

moved max pin count into constant

Fixes detailed status column

Fix https://github.com/tootsuite/mastodon/pull/10621#issuecomment-487316619

* 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

Fix #10616

Fixes #933

Due to glitch-soc's theming system, JS and CSS files are imported in a slightly
different order, and custom CSS rules were loaded *before* everything else.

They will now be loaded *after* everything else, which is a bit different from
upstream but should work better overall.

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