[gtk/grouped-toggle-fix] togglebutton: Fix expected group behavior

[Matthias Clasen <matthiasc src gnome org>]

commit 233e6622943688ed960d1c260d2b7462cd416850
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Apr 11 18:29:53 2021 -0400

    togglebutton: Fix expected group behavior
    
    The expectation is that a grouped button stays
    active when you click it. Grouped check buttons
    behave this way, and grouped toggle buttons should
    too.

 gtk/gtktogglebutton.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/gtk/gtktogglebutton.c b/gtk/gtktogglebutton.c
index 1e53a896c6..93ba0e7c07 100644
--- a/gtk/gtktogglebutton.c
+++ b/gtk/gtktogglebutton.c
@@ -199,6 +199,9 @@ gtk_toggle_button_clicked (GtkButton *button)
   GtkToggleButton *toggle_button = GTK_TOGGLE_BUTTON (button);
   GtkToggleButtonPrivate *priv = gtk_toggle_button_get_instance_private (toggle_button);
 
+  if (priv->active && (priv->group_prev || priv->group_next))
+    return;
+
   gtk_toggle_button_set_active (toggle_button, !priv->active);
 }