[server] add a looping task to free unused cnxsets capture by dead pyro When a pyro client disconnects, we're not necessarily notified so they can hang on to their session/cnxset forever. Don't let them do that. The hacky looping task is only installed when pyro is enabled. This optional activation save this very hacky patch from being rejected. closes #2825380

/***************************************/
/* Manage view (views/startup.py)      */
/***************************************/

table.startup {
  width: 100%;
}

/* table.startup td { */
/*   padding: 0.1em 0.2em; */
/* } */

table.startup td.addcol {
  text-align: right;
  width: 0.5em;
}

table.startup th{
  text-align: left;
}