Add dGPU preference to desktop file

Tell app to launch on dGPU if available.

Add dGPU preference to desktop file.

Tell the app to launch on the dGPU (in systems with hybrid graphics).

com.blackmagic.Resolve.desktop

@@ -3,3 +3,4 @@ Type=Application
 Name=Davinci Resolve
 Icon=com.blackmagic.Resolve
 Exec=/app/bin/resolve.sh
+PrefersNonDefaultGPU=true

com.blackmagic.ResolveStudio.desktop

@@ -3,3 +3,4 @@ Type=Application
 Name=Davinci Resolve Studio
 Icon=com.blackmagic.ResolveStudio
 Exec=/app/bin/resolve.sh
+PrefersNonDefaultGPU=true