Fixes: 3e59a4e4

488 translated messages.

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481 translated messages, 7 untranslated messages.

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Fixes: 4de9f769

488 translated messages.

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To avoid duplicate entries in the context menu, custom menu items should
be destroyed whenever xfce_panel_plugin_menu_destroy() is called, not
only when plugin->priv->menu != NULL, as this menu is only created the
first time it's when shown.

However, doing this reveals an additional call to
xfce_panel_plugin_menu_destroy() in xfce_panel_plugin_set_locked(),
which empties the menu after being populated by the plugin. I think this
call could simply be removed, but in any case it should only occur if
the plugin is locked, as there's no reason to empty the menu otherwise.

Fixes: #804
Related: 99127d1d, fb37ad2c

The XfceSMClient instance returned by xfce_sm_client_get() should only
be unreffed once, i.e. it is *not* transfer full contrary to what the
doc says.

Libxfce4ui >= 4.19.4 can be built without X11 support and therefore
whithout XfceSMClient.

453 translated messages, 35 untranslated messages.

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488 translated messages.

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461 translated messages, 27 untranslated messages.

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488 translated messages.

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Closes: #798
Related: !88

It's probably better in general, but especially since this 7924c969:
since the #ifdef is no longer based on GDK_WINDOWING_*, it can cause
macro redefinitions which, if done the wrong way round, could activate
code that shouldn't be.

487 translated messages, 1 untranslated message.

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* Use XDT_CHECK_OPTIONAL_FEATURE
* Only GTK Layer Shell remains as a truly optional package, and
  therefore HAVE_GTK_LAYER_SHELL as a compiler switch, in addition to
  ENABLE_X11 and ENABLE_WAYLAND.

So user can extend or override the flags provided there by defining the
DISTCHECK_CONFIGURE_FLAGS variable.

488 translated messages.

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Rare, but it can happen, for example if the terminal from which the
panel is launched loses focus while
panel_window_active_window_monitors_idle() is waiting.

488 translated messages.

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488 translated messages.

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488 translated messages.

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479 translated messages, 9 untranslated messages.

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This doesn't make sense. Libwnck handles this internally without any
obvious way for us to get the number of rows, so it's best not to allow
the user to change the number of rows in this case, as this will only
lead to bad results.

Completes: eeb9a578

It's simpler and getting the scale factor from the GdkWindow does not
work when the widget is not realized.

Closes: #789

It seems that the number of workspaces contained in a viewport is the
ratio of widths, at least when there is only one line. Not sure we
really support other cases.

Closes: #789
Fixes: 8f310b86

488 translated messages.

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488 translated messages.

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DISPLAY should not be set on Wayland and this paves the way for the
addition of an implementation using an embedded composer (libwlembed).

This no longer seems necessary after the switch to libxfce4windowing for
some reason, but it could become necessary again, and it's not a problem
to give libwnck a little time to update the layout.

Fixes: #784

Amends: 77c3494f

In particular, do not change borders if none are set, as is the case
when the background is a solid color or an image. This caused a
regression in the application of struts or autohide, as the panel could
end up one pixel after the edge of the screen.

Fixes: fc422756