autostart file made in flatpak version of desktop app uses wrong command

[queenbiscuit311]

When enabling "Launch on Startup" on the bluebubbles desktop flatpak, the following file is made in ~/.config/autostart:

[Desktop Entry]
Type=Application
Name=bluebubbles
Comment=bluebubbles startup script
Exec=/app/bluebubbles/bluebubbles [minimized]
StartupNotify=false
Terminal=false

The exec line here seems to be what the app thinks its path is in the flatpak container, but since the app needs to be launched outside of that container, this won't work. The actual file file that would be needed to accomplish opening the app at startup is this:

[Desktop Entry]
Type=Application
Name=bluebubbles
Comment=bluebubbles startup script
Exec=flatpak run app.bluebubbles.BlueBubbles [minimized]
StartupNotify=false
Terminal=false

The app would probably need to detect if it's running in flatpak and change the autostart file accordingly.