When errored without a error-message, no empty error-box will be shown Caught promise on validation-error -> no uncaught-error will be shown in the console
showsuccess to enable the
success-feedback-icon to be shown initially.
Showed error-msg when error occured before sending, like filesize exceeded
Bugfix using the uploader again after whenever multiple files were uploaded (error:
instance._io.reject is not a function)
Upgrade support for react 15.0
Prevent from override specific IE9-style which could shift the overlay-button on IE9