switch direct messages to mastoapi

# Conflicts:
#   src/services/api/api.service.js

* upstream/develop: (40 commits)
  review
  Update attachment normalizer
  Add fallback for attachments uploaded via the other platforms
  Get correct mimetype through entity_normalizer
  Set default parameter
  Switch to mastoapi for posting status and uploading media
  Revert changes
  prevent text pasting if image is pasted
  remove border radius of suggested emojis
  #450 - dispatch login after saved state is loaded
  #448 - fix timeline fetch error when status text is null
  #451 - add class to username span
  No need to fetch mutes on load anymore 
  switch to mastoapi
  switch to mastoapi
  masto api sends muted property now
  No need to fetch user data using old api anymore 
  Switch to mastoapi
  reactivity fixes
  less hackery, more direct usage of mastoapi
  ...

* upstream/develop: (47 commits)
  #449 - fix auth token fetch issue
  Make select tag use --inputText as text color
  #444 - remote follow clean up
  #444 - show `remote follow` button when logged out
  Add button to save without cropping
  post-merge fixes
  [i18n] Update oc.json
  after store: fix setting postFormats field
  fix user-card avatar falling into permament failed state
  fix flake id users not fetching correctly
  fix console error
  afterStoreSetup: Move log in and theme load to afterStoreSetup.
  afterStoreSetup: Handle 404 cases.
  afterStoreSetup: Emoji and nodeinfo refactor.
  afterStoreSetup: refactor TOS and panel fetching, handle 404s.
  afterStoreSetup: refactor.
  Load persistedStated with async/await.
  whoops
  レインせんぱいにサンキュー
  fix embedded relationship card parsing
  ...