Refactor media upload

Use Upload Media logic from Pleroma

Backend changes for picture upload

Move AS <-> Model conversion to separate module

Front changes

Downgrade apollo-client: https://github.com/Akryum/vue-apollo/issues/577

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

js/package.json

@@ -14,7 +14,7 @@
   "dependencies": {
     "apollo-absinthe-upload-link": "^1.5.0",
     "apollo-cache-inmemory": "^1.5.1",
-    "apollo-client": "^2.5.1",
+    "apollo-client": "2.5.1",
     "apollo-link": "^1.2.11",
     "apollo-link-http": "^1.5.14",
     "apollo-link-state": "^0.4.2",