Required fields must be marked as asterisk

[ramizmanked]

Field(s) must be marked by asterisk(*) symbol if it is required field on ​Submit a Site Form.

Also, we can apply client-side (i.e. javascript) validations to avoid sending blank form.

[dd32]

I'm okay with how this currently is.

The note about all fields being required is present above the submit button, and as all fields are required it doesn't really need to specify which fields are required.

Adding a client-side JS validation isn't out of the question, but the benefit in doing so is minimal. When the Showcase gets a redesign or make over, changing how this form works then would be good IMHO.

[dd32]

In 8010:

Showcase: Add HTML5 required attributes to the Site Submit form to get some basic client-side validation prior to submit.

This also marks the email and url fields as their HTML5 type to get the basic content validation too.

Fixes #4020.