Add primary-selection filter #4896

Job	Run time
smithay-check-features	3m 6s
format	14s
clippy-check	4m 29s
smithay-tests	2m 48s
check-msrv	1m 20s
check-minimal	1m 13s
anvil-check-features	2m 32s
Documentation on Github Pages	1m 16s
smallvil-check	50s
WLCS: Core tests	1m 14s
WLCS: Output tests	1m 13s
WLCS: Pointer input tests	1m 7s
WLCS: Bad Buffer Test	1m 17s
	22m 39s

Provide feedback