When add a new text, the item text in the tree view is selected and expanded.
When edit the pos of a text in the tree view, the new position is set directly, no need to lose focus or press enter key anymore for update the pos of the text.
git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@5089 bfdf4180-ca20-0410-9c96-a3a8aa849046
