Emulator

What's the problem? Describe what went wrong.

The QT frontend has an option for displaying a column with each files extension. ISO, GVZ etc. all appear in this column, but WAD does not.

What steps will reproduce the problem?

Load Dolphin with a WAD file in your chosen rom directory.
Enable the filter column with View > List Columns > File Format.

Is the issue present in the latest development version? For future reference, please also write down the version number of the latest development version.

Yes (5.0-12320)

Is the issue present in the latest stable version?

No (feature implemented after 5.0 stable released)

If the issue isn't present in the latest stable version, which is the first broken version? (You can find the first broken version by bisecting. Windows users can use the tool https://forums.dolphin-emu.org/Thread-green-notice-development-thread-unofficial-dolphin-bisection-tool-for-finding-broken-builds and anyone who is building Dolphin on their own can use git bisect.)

5.0-12212 (Feature introduced)