Added 'Remove attachment' logic, now the button works. The logic has been
aligned to the one for 'Remove object' and a little refactor has been done.
NOTE: attachments are currently not deleted from files database
Merge branch 'master' of https://github.com/doubleslashG/clinical-ui-boilerplate
after adding s3 storage support
Set localStorage for uploads - ImageMagick startup error with s3