add reset browser btn

renderer.js

@@ -19,6 +19,10 @@ window.addEventListener('load', () => {
         let audioAnalyse = document.getElementById("audio_analyse").checked;
         window.appointment.startBook(startNumber, endNumber, selectedStore, audioAnalyse);
     })
+
+    document.getElementById("clear_all_browsers").addEventListener('click', () => {
+        window.appointment.clearAllBrowsers();
+    })
     document.getElementById("store_selector").addEventListener('change', (event) => {
         selectedStore = event.target.value
     })