This is a feature request
Customer Use Case
Customer would like to have an option using a dropdown button or other user interface to limit the upload mimetypes in the attachment form field using the Form Editor.
Currently, there is no mime type selection available to choose from when uploading the documents.
When users (process designers) select attachment field upon designing a form using the form editor, a mimetype button appears, so the process designers can limit the types of files that are allowed for the attachment field for the end users to upload in case the process does not have the capacity to handle any specific file types.
The button can appear in 'General' Tab, or 'Attach File Options' Tab in the form editor attachment field, with a message, such as "limit the allowed file types", which then prompts dropdowns of mime types of the files to choose from.
For the representation of the desired interface, please find the attached screenshots - AttachOptions.png and sampleUpload.png