Quick fix to all drag & drop automatic start issues. Apparently you can
assign the files array of the uploader
($doc.getElById(fileUplaodId).files = droppedFiles). This makes the
whole files-not-set-before-drop-event issue a... non-issue. So yeah.
Merge pull request #1217 from toddis/TeamIconIssueFix

Update Team Icon Drag & Drop Bug Fix (SWC-1734)