This is an easy fix to a very annoying issue. Attaching (almost) the same fix as proposed in the original report with some screenshots demonstrating it.
Easy fix to apply to /usr/lib/x86_64-linux-gnu/nemiver/plugins/dbgperspective/ui/openfiledialog.ui Best regards Kostas
openfiledialog_orig.ui
Description: application/designer
openfiledialog_modified.ui
Description: application/designer