Exported CSV incompatible with /Manager CSV handler

[OGKevin]

When a user exports an CSV from the decrypt page, it doesn't work on the /Manager page.

On the /Maanger page users can upload an CSV with transactions and these get categorised and sorted. However I've kind of hard coded the code to only work with exported CSV from the bunq app. Need to rewrite the code to accept both, exported CSV from ComBunqWeb and bunq app