AbstractRichtexteditorConnector.fileUpload(String virtualFolderPath,
String type,
String filename,
String contentType,
File newFile)
Method that gets called when a 'FileUpload' command is issued by the rich text
editor.
AbstractRichtexteditorResult.richtexteditorFileUploadResult(ActionInvocation invocation)
Get the FileUploadResult computed from AbstractRichtexteditorConnector or its
decendant through AbstractRichtexteditorConnector#fileUpload(String, String, String, String, File).