Merge branch 'master' into glitch-soc/merge-upstream

Conflicts:
- `app/javascript/mastodon/features/compose/components/poll_form.js`:
  Upstream bumped poll option character limit, but we already had
  a higher one, kept ours.
- `app/validators/poll_validator.rb`:
  Upstream bumped poll option character limit, but we already had
  a higher one, kept ours.
- `config/initializers/content_security_policy.rb`:
  Upstream added a rule, the way we compute ours is different, but
  that added rule has been ported.
- `package.json`:
  No real conflict, dependency update. Performed the same update.
- `yarn.lock`:
  No real conflict, dependency update. Performed the same update.

app/javascript/mastodon/features/compose/components/poll_form.js

@@ -75,7 +75,7 @@ class Option extends React.PureComponent {
 
     return (
       <li>
-        <label className='poll__text editable'>
+        <label className='poll__option editable'>
           <span
             className={classNames('poll__input', { checkbox: isPollMultiple })}
             onClick={this.handleToggleMultiple}

app/javascript/mastodon/features/direct_timeline/components/conversation.js

@@ -160,7 +160,7 @@ class Conversation extends ImmutablePureComponent {
     return (
       <HotKeys handlers={handlers}>
         <div className={classNames('conversation focusable muted', { 'conversation--unread': unread })} tabIndex='0'>
-          <div className='conversation__avatar'>
+          <div className='conversation__avatar' onClick={this.handleClick} role='presentation'>
             <AvatarComposite accounts={accounts} size={48} />
           </div>