libxfce4ui: 4.18.0 -> 4.18.3

Release notes for 4.18.3
========================
- Add comment about the need for gtk_widget_destroy()
- Fix memory management in Vala generated code
- Add annotation "(nullable)" where appropriate
- Replace deprecated annotation: "(allow-none)"
- Harden xfce_gtk_handle_tab_accels (thunar#1067)
- screensaver: Avoid Xfconf warning
- shortcuts-grabber: Ignore keyboard layout change
- screensaver: Fix Xfconf memory management

Release notes for 4.18.2
========================
- Update copyright year
- Add XfceScreensaver (!89)
- docs: Fix broken links
- shortcut-dialog: Use parent window for the grab if possible (Fixes #52)
- Fix memory leak
- Fix memory leaks

Release notes for 4.18.1
========================
Bugfix release on the 4.18 branch

- XfceFileNameInput - wrap error message (Issue #60)
- xfce4-about: Removed excess square brackets
- Revert "XfceShortcutsGrabber: Detect auto-repeat key press"
- Translation Updates:
  Hebrew, Russian, Swedish

Signed-off-by: Kai Kang <kai.kang@windriver.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-xfce/recipes-xfce/libxfce4ui/libxfce4ui_4.18.3.bb

@@ -12,7 +12,7 @@ ANY_OF_DISTRO_FEATURES = "${GTK3DISTROFEATURES}"
 
 # TODO: Check if 0001-... can go
 SRC_URI += "file://0001-libxfce4kbd-private-xfce4-keyboard-shortcuts.xml-fix.patch"
-SRC_URI[sha256sum] = "532247c4387c17bb9ef94a73147039b8d013c3131c95cdbd2fa85fbcc848d06b"
+SRC_URI[sha256sum] = "afa3a46eeed3ab612d2f7e1308edaf5819f6c33ccc16c13080efabd58f010abd"
 
 EXTRA_OECONF += "--with-vendor-info=${DISTRO}"
 EXTRA_OECONF += "--disable-vala"