Refactored realtime API. Add dot component and colored dots in log.

components/common/Dot.js

@@ -0,0 +1,15 @@
+import React from 'react';
+import classNames from 'classnames';
+import styles from './Dot.module.css';
+
+export default function Dot({ color, size, className }) {
+  return (
+    <div
+      style={{ background: color }}
+      className={classNames(styles.dot, className, {
+        [styles.small]: size === 'small',
+        [styles.large]: size === 'large',
+      })}
+    />
+  );
+}

components/common/Dot.module.css

@@ -0,0 +1,17 @@
+.dot {
+  background: var(--green400);
+  width: 10px;
+  height: 10px;
+  border-radius: 100%;
+  margin-right: 10px;
+}
+
+.dot.small {
+  width: 8px;
+  height: 8px;
+}
+
+.dot.large {
+  width: 16px;
+  height: 16px;
+}