Add "Start Test" developerMode button (#333)

resources/developer-mode.mjs

diff --git a/resources/developer-mode.mjs b/resources/developer-mode.mjs
index 749b8c8..bd21a57 100644
--- a/resources/developer-mode.mjs
+++ b/resources/developer-mode.mjs
@@ -13,14 +13,18 @@
     const content = document.createElement("div");
     content.className = "developer-mode-content";
     content.append(createUIForSuites());
+
     content.append(document.createElement("hr"));
     content.append(createUIForMeasurementMethod());
     content.append(document.createElement("br"));
     content.append(createUIForWarmupSuite());
     content.append(document.createElement("br"));
     content.append(createUIForIterationCount());
-    details.append(content);
 
+    content.append(document.createElement("hr"));
+    content.append(createUIForRun());
+
+    details.append(content);
     container.append(details);
     return container;
 }
@@ -84,6 +88,7 @@
     return label;
 }
 
+
 export function createUIForSuites() {
     const control = document.createElement("nav");
     const ol = document.createElement("ol");
@@ -179,6 +184,18 @@
     return control;
 }
 
+function createUIForRun() {
+    let button = document.createElement("button");
+    button.textContent = `Start Test`;
+    button.onclick = (event) => {
+        globalThis.benchmarkClient.start();
+    }
+    let buttons = document.createElement("div");
+    buttons.className = "button-bar";
+    buttons.appendChild(button);
+    return buttons
+}
+
 function updateURL() {
     const url = new URL(window.location.href);
 

resources/main.mjs

diff --git a/resources/main.mjs b/resources/main.mjs
index 95e9aee..43de1a6 100644
--- a/resources/main.mjs
+++ b/resources/main.mjs
@@ -23,7 +23,12 @@
         this._showSection(window.location.hash);
     }
 
-    startBenchmark() {
+    start() {
+        if (this._startBenchmark())
+            this._showSection("#running");
+    }
+
+    _startBenchmark() {
         if (this._isRunning)
             return false;
 
@@ -253,7 +258,7 @@
         }
 
         if (params.startAutomatically)
-            this._startBenchmarkHandler();
+            this.start();
     }
 
     _hashChangeHandler() {
@@ -271,8 +276,7 @@
     }
 
     _startBenchmarkHandler() {
-        if (this.startBenchmark())
-            this._showSection("#running");
+        this.start();
     }
 
     _logoClickHandler(event) {