More work on PIVOT-873: "editOnMouseDown" style for TableView:  fix logic in SelectMode.NONE case
so this style works right to select the row for editing on first click.

This is a merge of revision 1446780 from branches/2.0.x to trunk.


git-svn-id: https://svn.apache.org/repos/asf/pivot/trunk@1446781 13f79535-47bb-0310-9956-ffa450edef68