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

Conflicts:
- `app/javascript/mastodon/features/compose/components/poll_form.js`
  conflict because of the poll option limit being different than upstream's

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

@@ -142,9 +142,7 @@ class PollForm extends ImmutablePureComponent {
         </ul>
 
         <div className='poll__footer'>
-          {options.size < 5 && (
-            <button className='button button-secondary' onClick={this.handleAddOption}><Icon id='plus' /> <FormattedMessage {...messages.add_option} /></button>
-          )}
+          <button disabled={options.size >= 5} className='button button-secondary' onClick={this.handleAddOption}><Icon id='plus' /> <FormattedMessage {...messages.add_option} /></button>
 
           <select value={expiresIn} onChange={this.handleSelectDuration}>
             <option value={300}>{intl.formatMessage(messages.minutes, { number: 5 })}</option>

app/javascript/mastodon/features/compose/containers/upload_button_container.js

@@ -3,7 +3,7 @@ import UploadButton from '../components/upload_button';
 import { uploadCompose } from '../../../actions/compose';
 
 const mapStateToProps = state => ({
-  disabled: state.getIn(['compose', 'is_uploading']) || (state.getIn(['compose', 'media_attachments']).size > 3 || state.getIn(['compose', 'media_attachments']).some(m => ['video', 'audio'].includes(m.get('type')))),
+  disabled: state.getIn(['compose', 'is_uploading']) || (state.getIn(['compose', 'media_attachments']).size + state.getIn(['compose', 'pending_media_attachments']) > 3 || state.getIn(['compose', 'media_attachments']).some(m => ['video', 'audio'].includes(m.get('type')))),
   unavailable: state.getIn(['compose', 'poll']) !== null,
   resetFileKey: state.getIn(['compose', 'resetFileKey']),
 });