message: Fix upload bar not populating when starting uploads
  Fixes
  See diff for more information
diff: @@ -43,7 +43,11 @@ export default class UploadBar extends React.Component<IProps, IState> {
  constructor(props) {
  super(props);
  - this.state = {uploadsHere: []};
  +
  + // Set initial state to any available upload in this room - we might be mounting
  + // earlier than the first progress event, so should show something relevant.
  + const uploadsHere = this.getUploadsInRoom();
  + this.state = {currentUpload: uploadsHere[0], uploadsHere};
  }
  componentDidMount() {
  @@ -56,6 +60,11 @@ export default class UploadBar extends React.Component<IProps, IState> {
  dis.unregister(this.dispatcherRef);
  }
  + private getUploadsInRoom(): IUpload[] {
  + const uploads = ContentMessages.sharedInstance().getCurrentUploads();
  + return uploads.filter(u => u.roomId === this.props.room.roomId);
  + }
  +
  private onAction = (payload: ActionPayload) => {
  switch (payload.action) {
  case Action.UploadStarted:
  @@ -64,8 +73,7 @@ export default class UploadBar extends React.Component<IProps, IState> {
  case Action.UploadCanceled:
  case Action.UploadFailed: {
  if (!this.mounted) return;
  - const uploads = ContentMessages.sharedInstance().getCurrentUploads();
  - const uploadsHere = uploads.filter(u => u.roomId === this.props.room.roomId);
  + const uploadsHere = this.getUploadsInRoom();
  this.setState({currentUpload: uploadsHere[0], uploadsHere});
  break;
  }
  