ANNOUNCE: xfce4-panel 4.21.0 released

[Gaël Bonithon]

xfce4-panel 4.21.0 is now available for download from
  
  https://archive.xfce.org/src/xfce/xfce4-panel/4.21/xfce4-panel-4.21.0.tar.xz
  https://archive.xfce.org/src/xfce/xfce4-panel/4.21/xfce4-panel-4.21.0.tar.xz?sha1
  https://archive.xfce.org/src/xfce/xfce4-panel/4.21/xfce4-panel-4.21.0.tar.xz?sha256


What is xfce4-panel?
====================

Xfce's panel.

Website: 
  https://docs.xfce.org/xfce/xfce4-panel/start


Release notes for 4.21.0
========================
[Please note that this is a development release.]

- build: Search for xdt-gen-visibility also in the working tree
- build: Replace xdt-csource with glib-compile-resources
- build: Define xfce4 min version >= 4.18
- Replace deprecated exo with libxfce4ui 4.21.0
- panel: Show window in panel_application_new_window()
- wayland: autohide: Mitigate lack of size_allocate()
- systray: Use correct gtk functions to show/hide items
- wayland: Set exclusive zone for autohide window
- build: Remove libxfce4panel-config.h from GI
- meson-build: Add missing check for sys/prctl.h
- tasklist: Support window app changes
- itembar: Fix memory leak mitigation on plugins
- build: Automate copyright year management
- item-dialog: Also search for plugins by their module name
- item-dialog: Add tooltip showing the module name
- I18n: Update po/LINGUAS list
- wayland: wrapper: Set GtkProgressBar style properties to min values
- Revert "systray: Always Use cairo_set_source_rgb() to clear icon 
background"
- systray: Always Use cairo_set_source_rgb() to clear icon background
- systray: Fix legacy icons being drawn with offset
- meson-build: Use SPDX license expression
- autotools-build: Check for xfce4-dev-tools in configure.ac
- libxfce4panel: Fix ABI break
- meson-build: Update debug/optimization flag management
- autotools-build: Get rid of maintainer mode where gdbus-codegen is 
used
- autotools-build: Remove some deprecated or unused CFLAGS
- libxfce4panel: Add missing include guards
- libxfce4panel: Don't install xfce-panel-plugin-provider.h
- build: Bump libxfce4windowing required version to 4.20.1
- Update copyright year
- meson-build: Don't add 'lib' prefix in static lib name
- meson-build: Simplify feature opt dep management
- meson-build: Ensure xfce-revision.h was generated when using it
- build: Use VERSION_FULL intead of VERSION or PACKAGE_VERSION
- autotools-build: Fix EXTRA_DIST redefinition
- meson-build: Remove unneeded conditional
- actions: Restore dialog accept on Enter behavior
- Add meson build
- Turn some messages into warnings
- build: Migrate to xdt-gen-visibility and xdt-check-abi
- wayland: windowmenu: Hide irrelevant workspace options
- wayland: pager: Hide workspace settings
- docs: Add missing parameter to XfcePanelPlugin::hidden-event
- wayland: libxfce4panel: Set kbd interact to on-demand for popup 
windows
- tasklist: Add missing workspace property initialization on Wayland
- panel: Deal with duplicated monitor models
- tasklist: Disable workspace related properties on Wayland
- prefs-dialog: Don't trust xfconf_channel_get_string_list() return 
value
- libxfce4panel: Fix XfcePanelPlugin size
- Add an hidden-event signal for plugins
- Translation Updates:
  Albanian, Bulgarian, Catalan, Chinese (China), Chinese (Taiwan),
  Czech, Danish, Dutch, English (United Kingdom), Estonian, French,
  German, Hebrew, Hungarian, Indonesian, Italian, Japanese, Lithuanian,
  Norwegian Bokmål, Polish, Portuguese, Portuguese (Brazil), Romanian,
  Russian, Serbian, Slovak, Swedish, Turkish, Ukrainian, Venetian,
  Vietnamese