lockscreen: Fit lock screen to smaller displays

If the device has smaller screen (or if it is scaled) the widget shall
go beyond the visible area.  So let's place it relatively and avoid
top margin thus it fits better
11 jobs for fit-lock-screen in 51 minutes and 23 seconds (queued for 47 minutes and 57 seconds)
latest
Status Job ID Name Coverage
  Build
passed #343987
librem5
build:cross-debian-bullseye:i386

00:13:15

passed #343988
librem5
build:native-alpinelinux-edge

00:09:03

passed #343986
librem5
build:native-debian-bullseye

00:12:01

 
  Test+Docs
passed #343990
librem5
build-gtkdoc

00:04:53

passed #343992
librem5
check-license-headers

00:03:04

passed #343991
librem5
check-po

00:00:31

passed #343994
librem5
test:smoke:one-output

00:01:59

passed #343995
librem5
test:smoke:two-outputs

00:01:59

passed #343993
librem5
unit-test:native-alpinelinux-edge

00:00:43

passed #343989
librem5
unit-test:native-debian-bullseye

00:04:27

14.3%
 
  Package
passed #343996
librem5:arm64
package:deb-debian-bullseye:arm64

00:24:13