[zenity/gtk4-port] (25 commits) ...Merge branch 'LARathbone/zenity-gtk4-port' into gtk4-port

[Logan Rathbone <larathbone src gnome org>]

Summary of changes:

  e5d841c... Get msg.c and util.c to build against gtk4.
  cbf1311... convert .ui to gtk4; make calendar, color, about build agai
  f17a8bf... entry, fileselection: make build against gtk4
  acac606... forms,msg,notification,option: make build against gtk4
  6e6dbce... Make remaining C files build against gtk4
  bfdbe34... Make zenity run with gtk4 (very unstable).
  95a11a7... Tweak layout of msg dialogs. Get font-setter to work with t
  5bcc3b1... password: use Builder for consistency with rest of app.
  cbc76d2... calendar: make it not crash and use GDateTime.
  6b6ef21... .ui: use resource; cleanup before commencing meson conversi
  71744aa... Start migrating to meson.
  2aac67b... Mass cleanup and finish meson migration.
  592e255... Add meson post-install script.
  3b9f5f9... Make icon notification-only.
  f79cddc... l10n updates and update manpage and yelp.
  4c5c1a9... Revert "l10n updates and update manpage and yelp."
  ea1bb47... Reintegrate help changes after prior revert.
  b1856f0... Update Canadian English translation.
  50f48b7... Update Nepali translation
  c17c80c... Update Nepali translation
  e5b52ef... Update Nepali translation
  ecd104c... Update Hebrew translation
  6de8275... Update Russian translation
  9c98fe6... Merge branch 'gtk4-port' into 'gtk4-port'
  f919a7a... Merge branch 'LARathbone/zenity-gtk4-port' into gtk4-port