GDK_KEY_Return or GDK_KEY_KP_Enter

Change-Id: I9bfe6ecd3490d9c6d12c21f8c8a7074e611f0eb7
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/93784
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
diff --git a/vcl/unx/gtk3/gtk3gtkinst.cxx b/vcl/unx/gtk3/gtk3gtkinst.cxx
index ee7486b..8cb8d0c 100644
--- a/vcl/unx/gtk3/gtk3gtkinst.cxx
+++ b/vcl/unx/gtk3/gtk3gtkinst.cxx
@@ -8391,7 +8391,7 @@ private:

    bool signal_key_press(GdkEventKey* pEvent)
    {
        if (pEvent->keyval == GDK_KEY_Return)
        if (pEvent->keyval == GDK_KEY_Return || pEvent->keyval == GDK_KEY_KP_Enter)
        {
            signal_activated();
            return true;