Make Prometheus in header link to status page.

This is consistent with alertmanager, and more intiutive for users.

The graphs page just has graphs, so remove mention of consoles.

Change-Id: I87780a4ade33697a6095423e1a7de47d341d2838

web/templates/_base.html

@@ -15,12 +15,12 @@
     <div class="navbar navbar-inverse navbar-fixed-top">
       <div class="navbar-inner">
         <div class="container-fluid">
-          <a class="brand" href="https://github.com/prometheus/prometheus" target="_blank">Prometheus</a>
+          <a class="brand" href="/">Prometheus</a>
           <ul class="nav">
             <li>{{ define "user_dashboard_link" }}{{ end }}
                 {{ template "user_dashboard_link" .}}</li>
             <li><a href="/alerts">Alerts</a></li>
-            <li><a href="/graph">Graph &amp; Console</a></li>
+            <li><a href="/graph">Graph</a></li>
             <li><a href="/">Status</a></li>
             <li><a href="/databases">Databases</a></li>
             <li>