This update for xfce4-panel, xfce4-pulseaudio-plugin, xfce4-taskmanager, xfce4-terminal, xfce4-whiskermenu-plugin fixes the following issues:

xfce4-panel:

- Update to version 4.18.5

* pager: Do not adapt upper value of spin button in viewport mode
* pager: Update workspace layout also on window manager change
* pager: Fix aspect ratio for viewport (V2)
* actions: Fix memory leak
* pager: Delay GdkScreen signal handlers
* panel: Do not scale background image when UI scale > 1
* popup-command: Do not block autohide when popped up at pointer
* Fix memory leaks when using gtk_css_provider_new()
* panel: Clear item list before repopulating item dialog
* panel: Remove autosave timer for plugins
* wrapper: Really ensure we don't call gtk_main_quit() twice
* panel: Block autohide when the panel has input focus
* clock: Fix sync timeout for seconds display
* clock: Implement ConsoleKit sleep monitor
* Add/Sharpen icons at 48-128px
* Adjust 32px icon margins, new separator icon
* Sharpen icons at 16px and 32px
* Increase margins for 24px icons
* Make 24px icons sharper
* icons: Fix wrong exported sizes
* Translation Updates

xfce4-pulseaudio-plugin:

- Update to version 0.4.8

* MPRIS: Use D-Bus name for identifying players
* Fix possible context menu crash with MPRIS playlist
* Add option to make mic icon persistent
* Check for mic widget visibility
* Preserve channel balance when changing sink/source volume
* MPRIS: Add option to send multimedia keys to all players
* MPRIS: Fix default controlled player by multimedia keys
* Remove dead code
* Translation Updates

xfce4-taskmanager:

- Update to version 1.5.6

* Update copyright year
* Rounded legend icons
* Reopen process window maximized when closed maximized
* Properly finalize global objects in main
* Add missing include
* Fix more memory leaks
* Fix memory leak
* Fix CSS related deprecation warnings
* Ignore GtkStatusIcon related deprecations
* Make libx11 optional, guard x11 code paths
* Change type so that memory values are correct (Fixes #65)
* settings-dialog: Fix untranslated label
* Add icons at missing sizes, clean up SVG metadata
* Add minimal support for Wayland
* Fix graph drop off on the right side
* Change graph peak variable to double
* Remove timeout before exiting main loop
* build: Add GLib requirement
* Do not treat missing swap as error on OpenBSD and NetBSD
* Fix process filter crash caused by the use of an uninitialized
variable
* Translation Updates

xfce4-terminal:

- Update to version 1.1.0

* Update copyright year
* Allow passing arguments to custom commands
* Fully translate strings in unsafe paste dialog
* window: Properly sync always-show-tabs
* cleanup: Include gdkx.h in one place
* preferences: Remove unused class member
* preferences: Check if channel itself exists instead of check
property
* screen: Review image loader memory management
* image-loader: Review cache management
* Add keywords to .desktop files (Fixes #50)
* screen: Take window scaling into account when drawing
(Fixes #71)
* Remove obsolete GNOME default-app file (Fixes #109)
* Add "Open File Manager Here" action (Fixes #133)
* Properly manage default encoding (Fixes #128)
* Move general include in private.h
* dropdown: Disable systray icon on Wayland
* Fix startup with GDK_BACKEND=x11 (Fixes #177)
* shortcuts: Restore broken action toggle-menubar
* shortcuts: Fix non-consumed key event for show-menubar
* main: Allow GTK to parse its options first (Fixes #216)
* search: Add missing sanity check
* Use GLib logging functions and do not translate warnings
* Remove obsolete CHECK_VERSION()
* Use g_new() instead of malloc()
* Fix Xfconf memory management
* search-dialog: Fix memory leak
* Remove extra separator at the end of context menu
* Missing shortcut keys in the standalone preferences dialog
(Issue #198)
* Apply 1 suggestion(s) to 1 file(s)
* Enable kinetic scrolling in VteTerminal
* Extend --disable-server description wrt. process model
* Drop obsolete --disable-server translations
* prefs-dialog: Fix untranslated strings
* Add sixel support
* Add icons at missing sizes, clean up SVG metadata
* build: Fix autoconf warnings
* build: Add GLib requirement
* Add accel entries for scrolling pages (Issue #221)
* Remove documentation for dead anti-aliasing option
* Make strings translatable (Issue #222)
* Fix shortcuts-editor include
* Support hyperlinks (Issue #21)
* Fix argument type for xfce_shortcuts_editor_new
* fix background_notify
* Remove disable-help preference.
* MR: !51 transitioned to Xfconf (#134)
* typos in MR !48 fixed
* Remove all references to terminal-preferences.glade
* Remove one more mention of terminal-preferences.glade
* Remove trailing slash
* Remove terminal-preferences-ui.h from makefile
* Remove terminal-preferences.glade
* MR: !48 shortcuts editor embedded into preferences-dialog (#195)
* MR: !48 preferences-dialog rewritten in C (#195)
* MR: !46 Change in implementation for TAB accels (#150)
* Implementation of MiscShiftArrowsToScroll as accelerators.
* Add PCRE2 build dependency
* Remove libxfce4ui 4.17 version guards
* Replace with xfce_gtk_menu_append_separator
* Tweak toolbar
* Translation Updates
- "gnome-control-center" support is no longer available; remove the
corresponding entries from the %files list

xfce4-whiskermenu-plugin:

- Update to version 2.8.0

* Fix menu toggling in Wayland.
* Fix menu position in Wayland.
* Add support for popping up specific menu instances. (Issue #95)
* Add showing menu at center of screen. (Issue #109)
* Replace options for positioning menu layout.
* Replace resize widgets with options in settings dialog.
* Replace command for switching users.
* Replace popup script with executable.
* Require Xfce 4.14.
* Make linking against AccountsService explicit.
* Stop including favorites in recent by default.
* Store settings in Xfconf.
* Translation updates