Implement SaveAs named action.

Closes: GNOME/evince#1314
5 jobs for implement-saveas-control in 10 minutes and 35 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Build
passed #518882
flatpak

00:07:34

manual #518881
allowed to fail manual
gtk-doc
passed #518878
master

00:10:35

manual #518879
allowed to fail manual
meson
manual #518880
allowed to fail manual
meson-gtk-doc