Ability to configure a plugin unique instance from administration

git-svn-id: https://ajaxplorer.svn.sourceforge.net/svnroot/ajaxplorer/trunk@3477 3bf36de4-da32-0410-8312-848cfbfe3f7d
Fixes on WebSocket server

git-svn-id: https://ajaxplorer.svn.sourceforge.net/svnroot/ajaxplorer/trunk@3478 3bf36de4-da32-0410-8312-848cfbfe3f7d
Last JS compile

git-svn-id: https://ajaxplorer.svn.sourceforge.net/svnroot/ajaxplorer/trunk@3479 3bf36de4-da32-0410-8312-848cfbfe3f7d