4.7.3

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- Add support to run plugins in valgrind.
- Add lXext to tasklist libraries (bug #6471).
- Add a pager mode with normal buttons.
- Fix menu positioning with autohide panels.
- Always wait for a grab if we popup menus from events.
- Don't handle grabs on the window from menu's.
- Register the plugin menu to block autohide.
- Make the session warning a non-aborting error for startxfce4.
- Allow to quit the panel if no session manager is running.
- Improve checking if we own the dbus name.
- Delay allocation of event table until we use it.
- Add workspace settings option to pager submenu.
- Libxfce4panel-1.0.pc is missing variable localedir (bug #6629).
- Remove deprecated encoding key from desktop files.
- Move helpers applications to $libdir.
- Move module panel plugins in $libdir/xfce4/panel/plugins.
- Add cast to fix a compile error in external 4.6 plugins.
- Fix activating the panel when a plugin asks for focus.
- Translation updates (pt_BR, da, hu, de, pt, ca, fr, kk, it,
  zh_TW).