Try to use browser storage instead of fingerprint in StayConnected (#2881)

COPYING

debian/copyright

lemonldap-ng-portal/bower.json

...g-portal/lib/Lemonldap/NG/Portal/Plugins/StayConnected.pm

lemonldap-ng-portal/site/coffee/registerbrowser.coffee

...nldap-ng-portal/site/htdocs/static/bwr/jssha/dist/sha1.js

...p-ng-portal/site/htdocs/static/bwr/jssha/dist/sha1.min.js

...ng-portal/site/htdocs/static/common/js/registerbrowser.js

...ortal/site/htdocs/static/common/js/registerbrowser.min.js

...l/site/htdocs/static/common/js/registerbrowser.min.js.map

...nldap-ng-portal/site/templates/common/registerBrowser.tpl