Add name field to contact form

[ghost]

To provide the recipient with the sender's name, add a required name field. If the user is already logged in, the user's name is inputted automatically, depending on the display name setting in admin area (username or real name).

[ecki]

I would recommend to always add the users's profile URL to the mail when the user is logged in. So you can make the name field editable, but you can still see what account was used (same is true for sender email modifications).

[ghost]

I totally agree to this proposal. Also, I would change the mail layout to the following:

++++++++++++++++++++++++++++++++++++++++++++++++++++++
New email via [site_name] - [site_url]

From: [Sender's name]
Email: [Sender's email]
Profile URL: [Sender's profile url]
Date: [Exact transmission date]

Subject: [Subject of email]

Message:
[Text of email]
++++++++++++++++++++++++++++++++++++++++++++++++++++++