Add user notes on accounts (#14148)

* Add UserNote model

* Add UI for user notes

* Put comment in relationships entity

* Add API to create user notes

* Copy user notes to new account when receiving a Move activity

* Address some of the review remarks

* Replace modal by inline edition

* Please CodeClimate

* Button design changes

* Change design again

* Cancel note edition when pressing Escape

* Fixes

* Tweak design again

* Move “Add note” item, and allow users to add notes to themselves

* Rename UserNote into AccountNote, rename “comment” Relationship attribute to “note”

app/javascript/mastodon/reducers/relationships.js

@@ -17,6 +17,9 @@ import {
   DOMAIN_BLOCK_SUCCESS,
   DOMAIN_UNBLOCK_SUCCESS,
 } from '../actions/domain_blocks';
+import {
+  ACCOUNT_NOTE_SUBMIT_SUCCESS,
+} from '../actions/account_notes';
 import { Map as ImmutableMap, fromJS } from 'immutable';
 
 const normalizeRelationship = (state, relationship) => state.set(relationship.id, fromJS(relationship));
@@ -57,6 +60,7 @@ export default function relationships(state = initialState, action) {
   case ACCOUNT_UNMUTE_SUCCESS:
   case ACCOUNT_PIN_SUCCESS:
   case ACCOUNT_UNPIN_SUCCESS:
+  case ACCOUNT_NOTE_SUBMIT_SUCCESS:
     return normalizeRelationship(state, action.relationship);
   case RELATIONSHIPS_FETCH_SUCCESS:
     return normalizeRelationships(state, action.relationships);