Customer form style updates

[cshold]

Minor style updates for customer area forms to ensure they're more unified in design.

cc/ @mpiotrowicz @stevebosworth

[mpiotrowicz]

code looks good, but are these design elements needed to display the forms?

[cshold]

To display them in line with the other base styles, yes. They were missed when changing the default form styles in an earlier PR. For example, the forgot password form:

Before:

After:

[cshold]

The above screenshots make more sense when you look at the login form too (which moves the 'forgot password' link below the Sign in button):

[cshold]

@mpiotrowicz good to go?