Removed RegisterOnTop() from GG::App and removed m_ontop from GG::Wnd.  On-topness is now a window property; use the creation flag GG::Wnd::ONTOP to create an on-top window.  Also fixed errors in the handling of clicks as double clicks.
Removed RegisterOnTop() from GG::App and removed m_ontop from GG::Wnd.  On-topness is now a window property; use the creation flag GG::Wnd::ONTOP to create an on-top window.  Also fixed errors in the handling of clicks as double clicks.


tzlaine/GG,tzlaine/GG,tzlaine/GG,tzlaine/GG