Add responsive features to layout

Closes #564

See merge request pleroma/pleroma!760

Revert "Merge branch 'feature/split-hide-network' into 'develop'"

See merge request pleroma/pleroma!758

This reverts merge request !733

object: use cached accesses when possible in Object.normalize()

See merge request pleroma/pleroma!757

Fix WebSocket streaming API URL.

See merge request pleroma/pleroma!756

Use nodeinfo 2.1

See merge request pleroma/pleroma!753

Extract the login responsible for obtaining websocket URL into the corresponding
Endpoint function.

MastodonAPI.MastodonAPIController: Return a 404 when we fail to get a list

See merge request pleroma/pleroma!755

splits actual nodeinfo generation into raw_nodeinfo, the 2.0 handler
gives the same result, while the 2.1 handler inserts the
software.repository field. requested by @href

Split hide_network into hide_followers & hide_followings

See merge request pleroma/pleroma!733

Serve sw-pleroma.js properly

See merge request pleroma/pleroma!754

Remove default value for rich media.

See merge request pleroma/pleroma!751

[#534] Unreachable federation targets retirement

Closes #534

See merge request pleroma/pleroma!703

that is the only change from nodeinfo 2.0 to 2.1

also this makes the nodeinfo tests use 2.1.json instead of 2.0.json

docs/Pleroma-API.md: Add missing token field documentation

See merge request pleroma/pleroma!752

[ci skip]

Setting it to true will actually override a 'false' set before.

User.follow_all: ensure the following array stays unique

See merge request pleroma/pleroma!750

rich media non-unicode bugfix

See merge request pleroma/pleroma!749

Clarify the description of the `logo_mask` configuration key.

See merge request pleroma/pleroma!747

Make rich media support toggleable

See merge request pleroma/pleroma!748