[glade] glade-button-editor: make translatable by default when label is toggled

[Juan Pablo Ugarte <jpu src gnome org>]

commit 7ff26ad6bfa22b9b0737e3beda09a291006658f4
Author: Pablo Barciela <scow riseup net>
Date:   Tue Oct 27 01:33:18 2020 +0100

    glade-button-editor: make translatable by default when label is toggled
    
    Fixes https://gitlab.gnome.org/GNOME/glade/-/issues/491

 plugins/gtk+/glade-button-editor.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/plugins/gtk+/glade-button-editor.c b/plugins/gtk+/glade-button-editor.c
index 7d7e0541..e187cc96 100644
--- a/plugins/gtk+/glade-button-editor.c
+++ b/plugins/gtk+/glade-button-editor.c
@@ -373,6 +373,7 @@ label_toggled (GtkWidget * widget, GladeButtonEditor * button_editor)
   glade_property_get_default (property, &value);
   glade_command_set_property_value (property, &value);
   g_value_unset (&value);
+  glade_property_i18n_set_translatable (property, TRUE);
 
   glade_command_pop_group ();