Wrong width was returned for the icon or label rectangle when querying the first column. Fix this and add a test to the sample allowing to check this. GetSubItemRect() still returns wrong results for second and subsequent columns, see #11355. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@62706 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775