initial attempt UI to delete subscription

Author: b1conrad

packages/pico-engine/public/index.html

@@ -352,6 +352,7 @@ <h2>Children</h2>
 <ul class="subscriptions-list" style="list-style: none;padding:0">
 {{#each subscriptions}}
 <li><input type="checkbox"> to pico "{{name}}" (did:npe:{{Tx}})
+<a href="/sky/event/{{../eci}}/delete-subscription/wrangler/subscription_cancellation?Tx={{this.Tx}}">del</a>
 <pre>{{this.asString}}</pre>
 </li>
 {{/each}}

packages/pico-engine/public/js/index.js

@@ -194,7 +194,7 @@ $.getJSON("/api/db-dump?legacy=true", function(db_dump){
           theSubscriptions[id].name = getV(pico,"dname");
         });
       }
-      callback({"subscriptions":subscriptionsCount ? theSubscriptions : false});
+      callback({eci:eci,"subscriptions":subscriptionsCount ? theSubscriptions : false});
     } else {
       callback(thePicoInp);
     }