ssb: Don't list broadcasts for identities to which we are already connected.

apps/ssb/tf-tab-connections.js

@@ -227,6 +227,7 @@ class TfTabConnectionsElement extends LitElement {
 				<ul class="w3-ul w3-border">
 					${this.broadcasts
 						.filter((x) => x.address)
+						.filter((x) => self.connections.map(c => c.id).indexOf(x.pubkey) == -1)
 						.map((x) => self.render_broadcast(x))}
 				</ul>
 				<h2>Connections</h2>