Correct the double-clicked word selection when at the end of a paragraph.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@75136 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Improved multiple table cell selection, especially for empty cells.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@75137 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775