Code review comment for lp:~alan-griffiths/miral/fix-1705973

Hmm, this does help, but also exposes some timing problem

I was testing this with

miral-shell&; sleep 0.2; mir_demo_client_egltriangle

Before this patch, yes the spinnytriangle is always on top. With this patch, there is a flicker where the triangle starts before the splash seems to, so there's a flicker.

Most likely a different issue tho