Add touch listeners for the scrollers

macrovision.js

@@ -1630,11 +1630,26 @@ document.addEventListener("DOMContentLoaded", () => {
         scrollHandle = setInterval(doScroll, 1000/20);
     });
 
+    document.querySelector("#scroll-left").addEventListener("touchstart", () => {
+        scrollDirection = -1;
+        scrollHandle = setInterval(doScroll, 1000/20);
+    });
+
+    document.querySelector("#scroll-right").addEventListener("touchstart", () => {
+        scrollDirection = 1;
+        scrollHandle = setInterval(doScroll, 1000/20);
+    });
+
     document.addEventListener("mouseup", () => {
         clearInterval(scrollHandle);
         scrollHandle = null;
     });
 
+    document.addEventListener("touchend", () => {
+        clearInterval(scrollHandle);
+        scrollHandle = null;
+    });
+
     document.querySelector("#options-world-fit").addEventListener("click", () => fitWorld(true));
 
     document.querySelector("#options-world-autofit").addEventListener("input", e => {