Setting tag plewww-4.3-64

Setting tag plewww-4.3-64
new jstorage to store stuff in the browser, start to use that to "remember" the open/closed tabs
uses MYSLICE_TOPHAT_AVAILABLE and MYSLICE_COMON_AVAILABLE to decide whether to add extra data
has a feature to 'test' pcu connection
only admins can add users to different sites.
remove dep. to outdated _gen_planetflow.php
rephrased (disabled, or pending registration)
+ various fixes