[gedit] Window: fix RTL bug for Open buttons in the headerbar

[Sébastien Wilmet <swilmet src gnome org>]

commit 9caaddeda336e21cbc5a4f1b9f2704a9f1fe1062
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Wed Apr 1 13:33:03 2020 +0200

    Window: fix RTL bug for Open buttons in the headerbar
    
    Fixes https://gitlab.gnome.org/GNOME/gedit/-/issues/293

 gedit/gedit-window.c | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)
---
diff --git a/gedit/gedit-window.c b/gedit/gedit-window.c
index e10bdb508..7b675a969 100644
--- a/gedit/gedit-window.c
+++ b/gedit/gedit-window.c
@@ -2619,15 +2619,19 @@ static GtkWidget *
 create_open_buttons (GeditWindow    *window,
                     GtkMenuButton **open_recent_button)
 {
-       GtkWidget *hgrid;
+       GtkWidget *hbox;
        GtkStyleContext *style_context;
        GtkWidget *open_dialog_button;
        GtkWidget *my_open_recent_button;
        AmtkApplicationWindow *amtk_window;
        GtkWidget *recent_menu;
 
-       hgrid = gtk_grid_new ();
-       style_context = gtk_widget_get_style_context (hgrid);
+       /* It currently needs to be a GtkBox, not a GtkGrid, because GtkGrid and
+        * GTK_STYLE_CLASS_LINKED doesn't work as expected in a RTL locale.
+        * Probably a GtkGrid bug.
+        */
+       hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
+       style_context = gtk_widget_get_style_context (hbox);
        gtk_style_context_add_class (style_context, GTK_STYLE_CLASS_LINKED);
 
        open_dialog_button = gtk_button_new_with_mnemonic (_("_Open"));
@@ -2641,16 +2645,16 @@ create_open_buttons (GeditWindow    *window,
        recent_menu = amtk_application_window_create_open_recent_menu (amtk_window);
        gtk_menu_button_set_popup (GTK_MENU_BUTTON (my_open_recent_button), recent_menu);
 
-       gtk_container_add (GTK_CONTAINER (hgrid), open_dialog_button);
-       gtk_container_add (GTK_CONTAINER (hgrid), my_open_recent_button);
-       gtk_widget_show_all (hgrid);
+       gtk_container_add (GTK_CONTAINER (hbox), open_dialog_button);
+       gtk_container_add (GTK_CONTAINER (hbox), my_open_recent_button);
+       gtk_widget_show_all (hbox);
 
        if (open_recent_button != NULL)
        {
                *open_recent_button = GTK_MENU_BUTTON (my_open_recent_button);
        }
 
-       return hgrid;
+       return hbox;
 }
 
 static void