Resolve "Add comments to all files"

Closes #67 (closed)

screens/profile/ChangeEmailScreen.js

@@ -24,6 +24,14 @@ import {
   toast500
 } from "../../constants/toasts"; 
 
+/**
+ * This component renders the screen where a user can change their email. To do this, the user has to re-authenicate due to it being a critical 
+ * feature. 
+ * 
+ * @param {*} props - used for redux and navigation. 
+ * 
+ * @returns the component. 
+ */
 const _ChangeEmailScreen = (props) => {
   const { userReducer, onEditEmail } = props;
   const [email, setEmail] = useState("");
@@ -32,7 +40,7 @@ const _ChangeEmailScreen = (props) => {
 
   const { user } = userReducer;
 
-  // for navigation to work on android
+  // To make the back-button on android behave correctly and not go to the VerifyPasswordScreen
   useEffect(() => {
     props.navigation.addListener('beforeRemove', (e) => {
       e.preventDefault();