switch: Make handle draggable

GNOME/gnome-shell!303
4 jobs for !303 with css-switches in 7 minutes and 18 seconds (queued for 2 seconds)
latest detached
Status Job ID Name Coverage
  Review
passed #293483
check_commit_log

00:00:23

 
  Build
passed #293484
build

00:05:33

 
  Test
passed #293485
test

00:01:20

passed #293486
test-pot

00:01:07