* [#1492] Fixed crashes when using file upload components with either a maximum filesize
  specified as empty string/value or a value containing spaces.
* [#1550] Fixed form desinger partial crash when adding a currency/number component
* Bump uwsgi version
* Ensure uwsgi runs in master process mode
* [#1453] Fixed user feedback for upload handler validation errors
* [#1498] Fixed duplicate payment completion updates being sent by
  registration backend(s)