Multiple configurations are accessed and maintained from a new main
window menu bar pop up menu "Configurations". The prior settings are
the "Default" entry. New configurations may be added by cloning
existing ones. Maintenance and navigation is via sub menus for each
configuration.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6623 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
