Add Middle click on open-new-tab to paste the url

Fixes: GNOME/epiphany#203
3 jobs from middle-click-open-new-tab in 18 minutes and 21 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #185831
flatpak

00:17:45

 
  Deploy
passed #185832
review

00:00:35

manual #185833
allowed to fail manual
stop_review