GtkFileFilter: Don't set the name from the GtkBuilder ID

Don't use the GtkBuilder ID for the filter name - this is an ID, not a human
readable name. The name can now be set with a property.
4 jobs for file-filter-name-property in 18 minutes and 12 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Build
passed #118996
fedora-x86_64

00:05:41

passed #118997
win32
msys2-mingw32

00:02:47

 
  Flatpak
passed #118998
flatpak:demo

00:05:01

passed #118999
flatpak:widget-factory

00:04:41