Issue 947 Improve the UI of the edit profile page

Below are the CSS/HTML changes that improve the visual apperance of the edit profile page:
1. Moved instructional text directly above form boxes.
2. Made cancel button line up with save button.
3. Changed "label" tags to "h2" or "h3" tags so that header names appear larger and bolder.
4. Included placeholders in all form input boxes.
5. Reduced row size of all input form boxes from 10 to 3 rows.