Increase the size of the windows in the grid sample

Make larger part of the grid visible initially and also show more lines
in the log window.

No real changes, this is purely cosmetic.

samples/grid/griddemo.cpp

@@ -432,7 +432,7 @@ GridFrame::GridFrame()
     grid = new wxGrid( this,
                        wxID_ANY,
                        wxPoint( 0, 0 ),
-                       FromDIP(wxSize( 400, 300 )) );
+                       FromDIP(wxSize( 800, 450 )) );
 
 
 #if wxUSE_LOG
@@ -440,7 +440,7 @@ GridFrame::GridFrame()
                              wxID_ANY,
                              wxEmptyString,
                              wxDefaultPosition,
-                             wxDefaultSize,
+                             wxSize(-1, 8*GetCharHeight()),
                              wxTE_MULTILINE );
 
     logger = new wxLogTextCtrl( logWin );