wxFlexGridSizer ctor was even used incorrectly even in layout sample itself, once again the code was supposed to create 3*3 sizer, not 3-column sizer with 3 pixel vertical gap. Changed ctors to be more explicit and to use a 5 pixel gap in both directions. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61643 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775