[gnome-system-monitor] Fixed menu popup problems

[Robert Roth <robertroth src gnome org>]

commit 07b570c6be54831efbe0e4127c4d2544413082a9
Author: Robert Roth <robert roth off gmail com>
Date:   Sat Oct 22 20:11:48 2016 +0300

    Fixed menu popup problems

 configure.ac      |    2 +-
 src/proctable.cpp |    4 +---
 2 files changed, 2 insertions(+), 4 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 5d2dc4f..5a52f11 100644
--- a/configure.ac
+++ b/configure.ac
@@ -31,7 +31,7 @@ LT_INIT
 GLIB_REQUIRED=2.37.3
 LIBWNCK_REQUIRED=2.91.0
 LIBGTOP_REQUIRED=2.28.2
-GTK_REQUIRED=3.12.0
+GTK_REQUIRED=3.22.0
 GNOME_ICON_THEME_REQUIRED=2.31
 GTKMM_REQUIRED=3.3.18
 GIOMM_REQUIRED=2.46
diff --git a/src/proctable.cpp b/src/proctable.cpp
index c8dc023..208a289 100644
--- a/src/proctable.cpp
+++ b/src/proctable.cpp
@@ -114,9 +114,7 @@ cb_tree_button_pressed (GtkWidget *widget, GdkEventButton *event, gpointer data)
 
     gtk_tree_path_free (path);
 
-    gtk_menu_popup (GTK_MENU (app->popup_menu),
-                    NULL, NULL, NULL, NULL,
-                    event->button, event->time);
+    gtk_menu_popup_at_pointer (GTK_MENU (app->popup_menu), NULL);
     return TRUE;
 }