Improve the tracing of the tracking rect manager and mouse movement synthesizer.
Fix a number of problems with tracking rectangles by avoiding rebuilding them when unnecessary.
Copyright 2007 Software 2000 Ltd.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@48170 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Use one run-loop observer for all synthesis of mouse moved events instead of a separate observer for each view.
Actually check the last mouse position and don't send synthesized events if the mouse hasn't moved.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@48133 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
