Allow empty hash for cleaner default URLs on the home screen (#349)

This makes sure we don't need the #home hash for the default page URL.

Author: camillobruni

resources/main.css

@@ -287,7 +287,8 @@ section {
     border-radius: 20px;
 }
 
-section:target {
+section:target,
+body:not(body:has(section:target)) #home {
     display: block;
 }
 

resources/main.mjs

@@ -331,20 +331,32 @@ class MainBenchmarkClient {
 
     _showSection(hash) {
         if (this._isRunning) {
-            window.location.hash = "#running";
+            this._setLocationHash("#running");
             return;
         } else if (this._hasResults) {
             if (hash !== "#summary" && hash !== "#details") {
-                window.location.hash = "#summary";
+                this._setLocationHash("#summary");
                 return;
             }
         } else {
-            if (hash !== "#home" && hash !== "#about") {
-                window.location.hash = "#home";
+            if (hash !== "" && hash !== "#home" && hash !== "#about") {
+                this._setLocationHash("#home");
                 return;
             }
         }
-        window.location.hash = hash || "#home";
+        this._setLocationHash(hash);
+    }
+
+    _setLocationHash(hash) {
+        if (hash === "#home" || hash === "")
+            this._removeLocationHash();
+        else
+            window.location.hash = hash;
+    }
+
+    _removeLocationHash() {
+        const location = window.location;
+        window.history.pushState("", document.title, location.pathname + location.search);
     }
 }