Use panel text instead of text for shoutbox icon

See merge request !1508

Fix popover in panel header styling

See merge request !1507

Fix phoenix sockets in dev mode

See merge request !1506

Fix no reactivity on vuex 4 values

Closes #1156

See merge request !1505

phoenix requires the Origin header to be set to the actual address,
so "http://localhost:xxxx" will not work.

Makes develop usable on stock PleromaBE

See merge request !1504

Fix phoenix at 1.6.2

See merge request !1502

According to https://github.com/phoenixframework/phoenix/issues/4623 ,
1.6.2 seems to not have the disconnection bug.

Migration to Vue 3 (again)

See merge request !1385

Remove Vue3 compat build

See merge request !1500

Fix English translation of Shoutbox in features panel

See merge request !1489

* vue3-again:
  oops

* vue3-again:
  fix some mishaps i noticed during self-review

* vue3-again:
  fix importer

* vue3-again:
  make all clickable icons into actual buttons

* vue3-again:
  fix emoji input warning spam
  fix error clear icon
  Add controlledShowingLongSubject and toggle in StatusContent props

Add controlledShowingLongSubject and toggle in StatusContent props

See merge request !1499

* vue3-again:
  fix warning about custom component
  fix?
  fix some issues with trees
  removing uselsess stuff
  fix reset buttons in profile again
  fix spacing in poll expiration label
  registration fixes