Add file format hint message
Disable file list when file upload process running
update message for not webrtc capable browser
Centred the Close button
Update browser versions for webrtc
use mic permission image not only for chrome
Centred the FileUploadWindow, restricted the width of file name to be shown in the list
Merge pull request #305 from syeshchenko/presentationWindowFix

FileUploader window fixes
Merge branch 'master' into merge-polling-with-master