fix(uui-file-dropzone): fix multi-folder drop losing all but first folder#1339

leekelleher merged 2 commits intov1/devumbraco/Umbraco.UI:v1/devfrom

v1/bugfix/file-dropzone-datatransfer-stalenessumbraco/Umbraco.UI:v1/bugfix/file-dropzone-datatransfer-stalenessCopy head branch name to clipboard