Improve Linux desktop entry metadata (missing Categories and file associations)

[itachi-re]

Summary

The Linux desktop entry currently ships with incomplete metadata.

Current desktop file:

[Desktop Entry]
Categories=
Comment=Fast And Powerful IPTV App
Exec=env WEBKIT_DISABLE_DMABUF_RENDERER=1 open_tv
Icon=open_tv
Keywords=open;tv;opentv;
Name=Fred TV
StartupWMClass=open_tv
Terminal=false
Type=Application

Issues

1. Empty Categories field

The Categories field is empty, which prevents desktop environments from properly classifying the application in menus and application launchers.

Suggested value:

Categories=AudioVideo;Video;Player;