Globally replace _T() with wxT().

Standardize on using a single macro across all wxWidgets sources and solve the name clash with Sun CC standard headers (see #10660).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61508 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/selstore.h

@@ -49,7 +49,7 @@ public:
     void Clear() { m_itemsSel.Clear(); m_count = 0; m_defaultState = false; }
 
     // must be called when a new item is inserted/added
-    void OnItemAdd(unsigned WXUNUSED(item)) { wxFAIL_MSG( _T("TODO") ); }
+    void OnItemAdd(unsigned WXUNUSED(item)) { wxFAIL_MSG( wxT("TODO") ); }
 
     // must be called when an item is deleted
     void OnItemDelete(unsigned item);