Move users#show into template/profileForm.

* Update users_controller to use the new template.
Set avatar in /show using AvatarController.
Make show and edit pages have similar profile name/description CSS styling.
Highlight social media placeholder on click.
Change character counters to be invisible.
Convert users#show into a readonly input element.
Add shadow settings, and style the character counter.
Style the CSS for the profile (both edit and show).