Browser extension fixes (#8)

* Set full url on service

* Link logo to `/activities` in modal

* Update changelog

* Honor the selected task and set the correct billability

src/js/components/shared/Header.js

@@ -1,13 +1,20 @@
 import React from 'react'
+import PropTypes from 'prop-types'
 import logoUrl from "images/logo.png"
 
-const Header = () => (
+const Header = ({ subdomain }) => (
   <div className="moco-bx-logo__container">
-    <img
-      className="moco-bx-logo"
-      src={chrome.extension.getURL(logoUrl)}
-    />
+    <a href={`https://${subdomain}.mocoapp.com/activities`} target="_blank" rel="noopener noreferrer">
+      <img
+        className="moco-bx-logo"
+        src={chrome.extension.getURL(logoUrl)}
+      />
+    </a>
   </div>
 )
 
+Header.propTypes = {
+  subdomain: PropTypes.string
+}
+
 export default Header