platforms-page: Force hide filtered rows

Make sure css :first-child and :last-child work correctly.
3 jobs for master in 34 minutes and 17 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #842947
flatpak
flatpak

00:31:16

passed #842946
flatpak
tests

00:10:01

 
  Deploy
passed #842948
nightly

00:03:00