h-gtk: Move appnotif.rs into the widgets module.

4 jobs for master in 58 minutes and 56 seconds (queued for 7 seconds)
Status Job ID Name Coverage
  Test
passed #39457
flatpak

00:44:24

passed #39456
rust:stable

00:11:48

 
  Lint
passed #39459
clippy

00:13:49

passed #39458
rustfmt

00:02:55