see #4029 - disable session save action when mapview is not showing


git-svn-id: http://josm.openstreetmap.de/svn/trunk@6149 0c6e7542-c601-0410-84e7-c038aed88b3b
see #4029 - fix: strings not updated after copy & paste


git-svn-id: http://josm.openstreetmap.de/svn/trunk@6150 0c6e7542-c601-0410-84e7-c038aed88b3b