It would be tremendous helpful to be able to customize the submit page. For both anonymous and logged users.
A new release of Diagramo is released 2.1. For it a "report bug" link will be provided with custom URL(https://bitbucket.org/scriptoid/Diagramo/issues/new?version=2.1)
Now....when someone using that app will submit a bug, that version (2.1) will be auto-completed.