fix #7436 (shortcut/toolbar redefinition) and EDT violations in Update Data [minor]
(3 methods of UpdateSelectionAction was made static)


git-svn-id: http://josm.openstreetmap.de/svn/trunk@6046 0c6e7542-c601-0410-84e7-c038aed88b3b
Merge branch 'master' into mirror