AFM - Data Loader - Clearer message confirming successful loading of bothFUM and Transaction files

The message below indicates the FUM file uploaded successfully, even though I included the data discrepancies above. FundAnalyser does not appear to be reliant on ensuring both files are loaded successfully as I have not received a message to load in the transaction file.

There needs to be a reminder for the user to load in the transaction file, as they may assume both files have been uploaded.