perf: link benchmark titles

For golang/go#48803.

Change-Id: I678a2dc5e668179d0fbaf4401aa810ad930c7933
Reviewed-on: https://go-review.googlesource.com/c/build/+/413421
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Run-TryBot: Michael Pratt <mpratt@google.com>

perf/app/dashboard/index.html

@@ -66,9 +66,13 @@ <h2 class="Dashboard-title" id="loading">Loading...</h2>
 		if (bench.Name != prevName) {
 			prevName = bench.Name;
 
+			let link = document.createElement("a");
+			link.href = "?benchmark=" + bench.Name;
+			link.innerHTML = bench.Name;
+
 			let title = document.createElement("h2");
 			title.classList.add("Dashboard-title");
-			title.innerHTML = bench.Name;
+			title.appendChild(link);
 			dashboard.appendChild(title);
 
 			grid = document.createElement("grid");

perf/app/dashboard/static/style.css

@@ -31,15 +31,9 @@ h2 {
 
 h1 > a,
 h2 > a {
-  display: none;
   text-decoration: none;
 }
 
-h1:hover > a,
-h2:hover > a {
-  display: inline;
-}
-
 h1 > a:hover,
 h2 > a:hover {
   text-decoration: underline;
@@ -60,9 +54,6 @@ header h1 {
   margin-right: 20px;
   padding-top: 5px;
 }
-header h1 a {
-  display: initial;
-}
 nav {
   display: inline-block;
 }