Style collection fixes


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@73353 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Detect when the window is still captured when dragging was aborted for some reason


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@73354 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775