[gnote] Make delete button visually destructive

[Aurimas Černius <aurimasc src gnome org>]

commit 1b1a107b3894f658ef8c331249d4093a3e8d1fc2
Author: Aurimas Černius <aurisc4 gmail com>
Date:   Tue Sep 20 22:11:47 2022 +0300

    Make delete button visually destructive
    
    Fixes https://gitlab.gnome.org/GNOME/gnote/-/issues/120

 src/note.cpp | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/note.cpp b/src/note.cpp
index d04fff6b..798bbcff 100644
--- a/src/note.cpp
+++ b/src/note.cpp
@@ -76,6 +76,7 @@ namespace gnote {
 
       button = manage(new Gtk::Button(_("_Delete"), true));
       button->property_can_default().set_value(true);
+      button->get_style_context()->add_class("destructive-action");
       button->show ();
       dialog.add_action_widget(*button, 666);