Polyseat 0.35.1

Signing in to Steam ended on a black screen. 0.35.0 put the sign in window
of a new seat on the screen and stopped there. Steam starts without a window,
so once the sign in was done there was nothing left to show, and nothing said
that Steam had to be picked a second time. The seat now waits for the sign in
to finish and opens Big Picture after it.

Big Picture was asked for again while it was on the screen. After a sign
in, and whenever gamescope has had nothing to show for a moment, its window
comes back without the name the seat looked for it by. Picking Steam in
Moonlight then asked Steam for Big Picture every five seconds for a minute and
a half. The window is now recognised by the process it belongs to as well.

Everything 0.35.0 says applies, including that seats have to be built again:
recipe generation 63.