Re-Added wxStream::StreamSize()

  Re-Added wxStream::StreamSize()
  Added in-place editting to wxTreeCtrl,
    modified wxListCtrl in-place editting
  Corrected behaviour of wxToolBar::Toggle() to not
    send messages and to report the correct state
  Removed many #include "wx/wx.h" to speed up
   compilation
 Some more compile fixes and tests.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@3132 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775