[gtk+] HeaderBar: Use less clashing appmenu fallback icon

[Daniel Boles <dboles src gnome org>]

commit be85c8b1fd7d3eda4cba6a0a72c9ccc5c5b33eb3
Author: Daniel Boles <dboles src gnome org>
Date:   Sun Aug 6 18:03:27 2017 +0100

    HeaderBar: Use less clashing appmenu fallback icon
    
    process-stop-symbolic is unintuitive if represented as a stop sign as in
    Adwaita, and completely ambiguous if represented as a cross like the
    window close button in other icon themes.
    
    Instead, use application-x-executable, which is already used elsewhere
    as a fallback if no specific icon can be found for the application.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=784624

 gtk/gtkheaderbar.c |   10 +++++++++-
 1 files changed, 9 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkheaderbar.c b/gtk/gtkheaderbar.c
index c5d4401..e463da4 100644
--- a/gtk/gtkheaderbar.c
+++ b/gtk/gtkheaderbar.c
@@ -352,6 +352,7 @@ _gtk_header_bar_update_window_buttons (GtkHeaderBar *bar)
                   gtk_style_context_add_class (gtk_widget_get_style_context (button), "titlebutton");
                   gtk_style_context_add_class (gtk_widget_get_style_context (button), "icon");
                   gtk_widget_set_size_request (button, 20, 20);
+
                   if (!_gtk_header_bar_update_window_icon (bar, window))
                     {
                       gtk_widget_destroy (button);
@@ -372,12 +373,16 @@ _gtk_header_bar_update_window_buttons (GtkHeaderBar *bar)
                   image = gtk_image_new ();
                   gtk_container_add (GTK_CONTAINER (button), image);
                   gtk_widget_set_can_focus (button, FALSE);
+
                   accessible = gtk_widget_get_accessible (button);
                   if (GTK_IS_ACCESSIBLE (accessible))
                     atk_object_set_name (accessible, _("Application menu"));
+
                   priv->titlebar_icon = image;
                   if (!_gtk_header_bar_update_window_icon (bar, window))
-                    gtk_image_set_from_icon_name (GTK_IMAGE (priv->titlebar_icon), "process-stop-symbolic", 
GTK_ICON_SIZE_MENU);
+                    gtk_image_set_from_icon_name (GTK_IMAGE (priv->titlebar_icon),
+                                                  "application-x-executable-symbolic", GTK_ICON_SIZE_MENU);
+
                   priv->shows_app_menu = TRUE;
                 }
               else if (strcmp (t[j], "minimize") == 0 &&
@@ -393,6 +398,7 @@ _gtk_header_bar_update_window_buttons (GtkHeaderBar *bar)
                   gtk_widget_set_can_focus (button, FALSE);
                   g_signal_connect_swapped (button, "clicked",
                                             G_CALLBACK (gtk_window_iconify), window);
+
                   accessible = gtk_widget_get_accessible (button);
                   if (GTK_IS_ACCESSIBLE (accessible))
                     atk_object_set_name (accessible, _("Minimize"));
@@ -415,6 +421,7 @@ _gtk_header_bar_update_window_buttons (GtkHeaderBar *bar)
                   gtk_widget_set_can_focus (button, FALSE);
                   g_signal_connect_swapped (button, "clicked",
                                             G_CALLBACK (_gtk_window_toggle_maximized), window);
+
                   accessible = gtk_widget_get_accessible (button);
                   if (GTK_IS_ACCESSIBLE (accessible))
                     atk_object_set_name (accessible, maximized ? _("Restore") : _("Maximize"));
@@ -432,6 +439,7 @@ _gtk_header_bar_update_window_buttons (GtkHeaderBar *bar)
                   gtk_widget_set_can_focus (button, FALSE);
                   g_signal_connect_swapped (button, "clicked",
                                             G_CALLBACK (gtk_window_close), window);
+
                   accessible = gtk_widget_get_accessible (button);
                   if (GTK_IS_ACCESSIBLE (accessible))
                     atk_object_set_name (accessible, _("Close"));