Add RBF info to txdetail

static/templates/txdetail.html

@@ -3,6 +3,7 @@
     <div class="row line-bot">
         <div class="col-xs-7 col-md-8 ellipsis">
             <a href="/tx/{{$tx.Txid}}">{{$tx.Txid}}</a>
+            {{- if $tx.Rbf}}<span title="Replace-by-Fee (RBF) transaction, could be overriden"> RBF</span>{{end -}}
         </div>
         {{- if $tx.Blocktime}}<div class="col-xs-5 col-md-4 text-muted text-right">{{if $tx.Confirmations}}mined{{else}}first seen{{end}} {{formatUnixTime $tx.Blocktime}}</div>{{end -}}
     </div>
@@ -89,4 +90,4 @@
         </div>
     </div>
 </div>
-{{end}}
+{{end}}