Streaming and Backend Interactor service overhaul, removed the need for copypasting

See merge request !1012

* upstream/develop: (51 commits)
  toggle_activation api is also deprecated
  use vuex action
  refactor toggleActivationStatus
  replace setActivationStatus api with new one
  use flex for stickers
  i18n/update-ja_easy
  Use a centralized fallback for missing values and use instance.federating instead of instance.federation.enabled
  Add fallback in case BE does not report federating status in nodeinfo
  The value we are looking for is federationPolicy.enabled, not federationPolicy.federating
  Logic should be to hide TWKN if not federating OR if instance is not public
  Finally trust eslint
  More lint
  More lint
  Lint
  mfa: removed unused code
  increase icon width a little bit in the nav panel
  add icons to nav panel
  Revert "Merge branch 'revert-96cab6d8' into 'develop'"
  Support "native" captcha
  Revert "Merge branch 'oauth-extra-scopes' into 'develop'"
  ...

Fix "Deactivation of remote accounts from frontend does not work"

Closes #716

See merge request !1006

fix sticker picker height in emojo picker

See merge request !1022

Reinstate `push` and `admin` scopes

See merge request !1034

i18n/update-ja_easy

See merge request !1002

Change 403 messaging

See merge request !1020

interaction with BE private mode

See merge request !989

Upgrade babel to v7

Closes #733

See merge request !1029

mfa: fix login and recovery form

See merge request !1031

instance.federation.enabled

Also the || true fallback does not work and always becomes true

Private instances should not show any timelines

Add icons to nav panel

See merge request !1016

This reverts merge request !1032

Support "native" captcha

See merge request !1033

Fix css runtime loading issue

Closes #734

See merge request !1030

Revert "Merge branch 'oauth-extra-scopes' into 'develop'"

See merge request !1032

This reverts merge request !1024