311 add spinner and disable the upload button when upload files#331

longshuicy merged 3 commits intomainclowder-framework/clowder2:mainfrom

311-add-spinner-and-disable-the-upload-button-when-upload-filesclowder-framework/clowder2:311-add-spinner-and-disable-the-upload-button-when-upload-filesCopy head branch name to clipboard