fix: Header Component - Replaced class by func. comp (#142)

* refactor: replaced class by func.comp

* refactor: replacing jest test by react-testing-library

* refactor: added test todos

* feat: added more unit tests

* fix: fixed tooltip import

* fix: fixed test

* fix: fixed typo

* fix: fixed imports

src/components/Header/HeaderLogo.tsx

@@ -0,0 +1,17 @@
+import React from 'react';
+
+import Logo from '../Logo';
+
+interface Props {
+  logo?: string;
+}
+
+const HeaderLogo: React.FC<Props> = ({ logo }) => {
+  if (logo) {
+    return <img alt="logo" height="40px" src={logo} />;
+  }
+
+  return <Logo />;
+};
+
+export default HeaderLogo;