Setup.pm has an 'onChange' for 'language' and Prefs.pm ALSO has 'language'
listedn in its %prefChange hash.  This means those routines are being called
twice.  This is not the cause of the problem, but should be cleaned up as part
of the solution.

Created attachment 807 [details]
clear plugins completely and reload

the main problem is that initPlugins doesn't run the plugin strings routines if
the plugin is shown as already loaded.	On changing language, clear the plugins
hash to force a full reload.  Its a bit intensive, but works.

darn, however, enabling or disabling will also call Plugins::clearGroups, so
clearing the plugins hash probably needs to be its own function:

sub clearPlugins {
   %plugins = {};
   clearGroups();
}

and call that from 'language'{'onChange'} instead of clearGroups.

Fix from kdf checked in as subversion change 4193.