Implemented the use of the IsUpload variable to not check for errors if the user is uploading or deleting an attachment. QA of the module and implemented some missing server side validations.
Implemented the use of the IsUpload variable to not check for errors if the user is uploading or deleting an attachment. QA of the module and implemented some missing server side validations.

otrs-xx/otrs,otrs-xx/otrs,otrs-xx/otrs,otrs-xx/otrs