1. fixed typo ('&' instead of '|') in wxNotebook

1. fixed typo ('&' instead of '|') in wxNotebook
2. changed wxTC_MULTILINE to be equal to wxNB_MULTILINE and != 0
3. much more efficient selection handling in virtual wxListCtrl,
   we can now select 1000000 items without problems
4. kbd/mouse selection (ctrl/shift handling) fixed in wxListCtrl
5. added wxSortedArray::IndexForInsert() and AddAt(), remove Remove(size_t),
   use RemoveAt() instead

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@10889 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775