[chronojump] Devices window cannot be minimized (avoid fake hangs when is minimized and user do not find it)

[Xavier de Blas <xaviblas src gnome org>]

commit 4d3b61f3974a3eacd3601451530de275f069c010
Author: Xavier de Blas <xaviblas gmail com>
Date:   Tue Sep 22 17:53:40 2020 +0200

    Devices window cannot be minimized (avoid fake hangs when is minimized and user do not find it)

 src/gui/chronopicRegister.cs | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/gui/chronopicRegister.cs b/src/gui/chronopicRegister.cs
index e9b2f685..8561202f 100644
--- a/src/gui/chronopicRegister.cs
+++ b/src/gui/chronopicRegister.cs
@@ -149,6 +149,7 @@ public class ChronopicRegisterWindow
                chronopic_register_win.Modal = true;
                chronopic_register_win.TransientFor = app1;
                chronopic_register_win.WindowPosition = Gtk.WindowPosition.CenterOnParent;
+               chronopic_register_win.TypeHint = WindowTypeHint.Dialog;
 
                chronopic_register_win.DeleteEvent += on_delete_event;