Resolves: tdf#102957 revert SetMinOutputSizePixel workaround

of

commit afeddaf7
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

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*/)

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 )