How to deal with sizefull?

[amahdy]

1.0.0-alpha5

Here is the code:

        CssLayout l1 = new CssLayout();
        l1.addStyleName("red");
        l1.setSizeFull();
        CssLayout l2 = new CssLayout();
        l2.addStyleName("blue");
        l2.setSizeFull();

        Board b = new Board();
        b.addRow(l1, l2).setSizeFull();
        b.setSizeFull();

        setContent(b);

And theme:

  .red {
    background-color: red;
  }

  .blue {
    background-color: blue;
  }

When screen size is small enough, l2 disappears totally.