[gnome-control-center] keyboard: fix gtk_widget_get_can_default assertion error

[Robert Ancell <rancell src gnome org>]

commit 57a0f909d41c526b2fc65c470684f72ec802778c
Author: Ian Douglas Scott <idscott system76 com>
Date:   Thu Sep 17 10:19:51 2020 -0700

    keyboard: fix gtk_widget_get_can_default assertion error
    
    Occured when showing the "Replace" button.

 panels/keyboard/cc-keyboard-shortcut-editor.ui | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/panels/keyboard/cc-keyboard-shortcut-editor.ui b/panels/keyboard/cc-keyboard-shortcut-editor.ui
index c84ce0349..e9047090f 100644
--- a/panels/keyboard/cc-keyboard-shortcut-editor.ui
+++ b/panels/keyboard/cc-keyboard-shortcut-editor.ui
@@ -311,6 +311,7 @@
             <property name="label" translatable="yes">Replace</property>
             <property name="visible">True</property>
             <property name="can_focus">True</property>
+            <property name="can_default">True</property>
             <property name="receives_default">True</property>
             <signal name="clicked" handler="replace_button_clicked_cb" object="CcKeyboardShortcutEditor" 
swapped="yes" />
           </object>