restyle chatbox and some refactoring

src/components/dock.jsx

@@ -0,0 +1,22 @@
+import React from "react"
+import PropTypes from "prop-types"
+
+const Dock = ({ handleToggleOpen }) => {
+
+  return(
+    <button
+      type="button"
+      className="dock"
+      onClick={handleToggleOpen}
+      onKeyPress={handleToggleOpen}
+      aria-labelledby="open-chatbox-label"
+    >
+      <div id="open-chatbox-label">Start a new chat</div>
+      <div className="label-icon">
+        <div className={`btn-icon`} aria-label={`Open support chat window`}>+</div>
+      </div>
+    </button>
+  )
+}
+
+export default Dock;