window: Allow reaching smaller sizes

So that it works fine on devices with smaller screen (like librem5)
4 jobs for wip/sadiq/window-size in 7 minutes and 6 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
passed #492030
build-and-test

00:06:24

passed #492031
flatpak

00:00:40

 
  Deploy
passed #492032
review

00:00:21

passed #492033
manual
stop_review

00:00:20