- Update to version 4.18.3
* launcher: Show action menu also when there are several items
* Fix memory management of vala generated plugins
* panel: Rephrase "Don't reserve space on borders" (V2)
* panel: Make property migration generic
* launcher: Avoid "no trigger event" warning when showing the menu
* launcher: Guard access to the plugin menu GdkWindow
* libxfce4panel: Unregister menu also on GtkWidget::hide
* panel: Do not reset output name if a monitor does not have a model name
* libxfce4panel: Fix memory management of source for menu positioning
* panel: Delay removal of ExternalPlugin to prevent use-after-free
* systray: Cancel any async D-Bus operation in finalize()
* tasklist: Do not try to resolve /proc/pid/exe to launch new instance
* Translation Updates (forwarded request 1075061 from manfred-h)