Fix rendering performances issues related to scrolling events (#174)

* memoize chat related components

* Avoid re-rendering ChatInput on every message udpate

* change the way the horizontal scrollbar is hidden

* make the scroll event listener passive

* perf(Chat): fix performances issues related to autoscroll

Uses the intersection API to determine autoscroll mode instead of listening for scroll events

* tuning detection of autoscroll

utils/index.ts

@@ -0,0 +1,19 @@
+export function throttle<T extends (...args: any[]) => any>(func: T, limit: number): T {
+    let lastFunc: ReturnType<typeof setTimeout>;
+    let lastRan: number;
+
+    return ((...args) => {
+        if (!lastRan) {
+            func(...args);
+            lastRan = Date.now();
+        } else {
+            clearTimeout(lastFunc);
+            lastFunc = setTimeout(() => {
+                if (Date.now() - lastRan >= limit) {
+                    func(...args);
+                    lastRan = Date.now();
+                }
+            }, limit - (Date.now() - lastRan));
+        }
+    }) as T;
+}