* Improve PopupMenuLauncher to automatically select JTable/JList/JTree line under cursor
* Simplify all popup menus with this new feature
* Remove custom popup menus in BoundingBoxSelection and BoundingBoxSelection to use default text field popup menus recently introduced
* Fix EDT violations in changeset window
* Make Autoscale actions publicly available in MainMenu
* Add a new "Zoom to problem" mode in AutoScaleAction
* Make "Zoom to problem" menu item in validator dialog use this new feature
* Update enabled state of "Zoom to Conflict" and "Zoom to problem" against selection of conflict/validator dialog

git-svn-id: http://josm.openstreetmap.de/svn/trunk@5958 0c6e7542-c601-0410-84e7-c038aed88b3b