Resolves: tdf#102957 revert SetMinOutputSizePixel workaround

of

commit afeddaf7e0d11ad9b1df0c80bcc3f50caa87e21a
Author: Caolán McNamara <caolanm@redhat.com>
Date:   Wed Dec 16 10:46:10 2015 +0000

    Related: rhbz#1281906 set a min size on un-resizeable non-layout dialogs

and using a mixture of gtk_window_set_default_size before its visible, and
gtk_window_set_default_size + gtk_window_resize after its shown now works for
me under wayland so the original problem can be solved that way

Change-Id: Iaf8fd3019a7e902ad07b6825f919c6f25288e9b7
diff --git a/vcl/source/window/syswin.cxx b/vcl/source/window/syswin.cxx
index f7732910..e7e6683 100644
--- a/vcl/source/window/syswin.cxx
+++ b/vcl/source/window/syswin.cxx
@@ -1162,10 +1162,6 @@ void SystemWindow::DoInitialLayout()
        setOptimalLayoutSize();
        mbIsCalculatingInitialLayoutSize = false;
    }
    else if (IsDialog() && !(GetStyle() & WB_SIZEABLE))
    {
        SetMinOutputSizePixel(GetSizePixel());
    }
}

void SystemWindow::doDeferredInit(WinBits /*nBits*/)
diff --git a/vcl/unx/gtk3/gtk3gtkframe.cxx b/vcl/unx/gtk3/gtk3gtkframe.cxx
index 3a1fb9a..e17a8b8 100644
--- a/vcl/unx/gtk3/gtk3gtkframe.cxx
+++ b/vcl/unx/gtk3/gtk3gtkframe.cxx
@@ -901,7 +901,9 @@ void GtkSalFrame::window_resize(long nWidth, long nHeight)
{
    m_nWidthRequest = nWidth;
    m_nHeightRequest = nHeight;
    gtk_window_resize(GTK_WINDOW(m_pWindow), nWidth, nHeight);
    gtk_window_set_default_size(GTK_WINDOW(m_pWindow), nWidth, nHeight);
    if (gtk_widget_get_visible(m_pWindow))
        gtk_window_resize(GTK_WINDOW(m_pWindow), nWidth, nHeight);
}

void GtkSalFrame::resizeWindow( long nWidth, long nHeight )