ui: Move link to flaky tests to sitemap

It's more visible / accessible up there.

Author: danobi

ui/nipa.css

@@ -45,10 +45,6 @@ tr:nth-child(even) {
     border: solid grey 1px;
 }
 
-#flake-link {
-    margin: 1em;
-}
-
 @media (prefers-color-scheme: dark) {
     body {
         color: #b8b8b8;

ui/sitemap.html

@@ -1,5 +1,6 @@
 <nav>
   <img src="/favicon-status.png" style="height: 1em;"> <a href="/status.html">Status</a> |
   <img src="/favicon-contest.png" style="height: 1em;"> <a href="/contest.html">Result log</a> |
-  <img src="/favicon-stats.png" style="height: 1em;"> <a href="/checks.html">Check stats</a>
+  <img src="/favicon-stats.png" style="height: 1em;"> <a href="/checks.html">Check stats</a> |
+  <img src="/favicon-flakes.png" style="height: 1em;"> <a href="/flakes.html">Flaky tests</a>
 </nav>

ui/status.html

@@ -93,10 +93,6 @@ <h3>Continuous testing results</h3>
         <div id="contest-filters">
             <h3>Patchwork reporting</h3>
             <p id="cf-execs"></p>
-            <div id="flake-link">
-                <img src="favicon-flakes.png" style="height: 1em;"/>
-                <a href="flakes.html">Test flakiness view</a>
-            </div>
             <h4>Ignored tests:</h4>
             <table id="cf-tests">
                 <tr id="cf-tests-hdr">