[gnome-commander/NoLibGnomeUi] Remove usage of libgnomeui in test-plugin

[Uwe Scholz <uwescholz src gnome org>]

commit 5f896b0a516d9a331efffd6e99e538769fb12839
Author: Uwe Scholz <u scholz83 gmx de>
Date:   Sun Mar 1 22:23:15 2020 +0100

    Remove usage of libgnomeui in test-plugin

 plugins/test/test-plugin.cc | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)
---
diff --git a/plugins/test/test-plugin.cc b/plugins/test/test-plugin.cc
index e21f6c45..141102f2 100644
--- a/plugins/test/test-plugin.cc
+++ b/plugins/test/test-plugin.cc
@@ -21,7 +21,6 @@
 
 #include <config.h>
 #include <gtk/gtk.h>
-#include <libgnomeui/gnome-dialog-util.h>
 #include <libgcmd/libgcmd.h>
 #include "test-plugin.h"
 #include "test-plugin.xpm"
@@ -31,7 +30,6 @@
 #define AUTHOR "Marcus Bjurman <marbj499 student liu se>"
 #define WEBPAGE "http://gcmd.github.io";
 
-
 static PluginInfo plugin_nfo = {
     GNOME_CMD_PLUGIN_SYSTEM_CURRENT_VERSION,
     NAME,
@@ -56,7 +54,13 @@ static GnomeCmdPluginClass *parent_class = NULL;
 
 static void on_dummy (GtkMenuItem *item, gpointer data)
 {
-    gnome_ok_dialog ("Test plugin dummy operation");
+    GtkWidget* dialog = gtk_message_dialog_new (nullptr,
+                                     GTK_DIALOG_MODAL,
+                                     GTK_MESSAGE_ERROR,
+                                     GTK_BUTTONS_CLOSE,
+                                     "Test plugin dummy operation");
+    gtk_dialog_run (GTK_DIALOG (dialog));
+    gtk_widget_destroy (dialog);
 }
 
 
@@ -129,12 +133,16 @@ static void update_main_menu_state (GnomeCmdPlugin *plugin, GnomeCmdState *state
 
 static void configure (GnomeCmdPlugin *plugin)
 {
-    gnome_ok_dialog ("Test plugin configuration dialog");
+    GtkWidget* dialog = gtk_message_dialog_new (nullptr,
+                                     GTK_DIALOG_MODAL,
+                                     GTK_MESSAGE_ERROR,
+                                     GTK_BUTTONS_CLOSE,
+                                     "Test plugin configuration dialog");
+    gtk_dialog_run (GTK_DIALOG (dialog));
+    gtk_widget_destroy (dialog);
 }
 
 
-
-
 /*******************************
  * Gtk class implementation
  *******************************/