Remove unnecessary vendor prefixes

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Adapt copyright Rake task for Sass sources

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Use single-line Sass comments for copyright header

Sass single-line comments are preferable as they are removed from
CSS output (thus fewer KB's for end users).

We do not convert copyright headers for entry-point stylesheets
(default.css, legacy.css, scm.css).

See also de29c354.

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Test form representer
Test WP schema's status property
Implement WP form representation
Add status to property
Add API V3 form endpoint
Correct describe block description
fix text below subject jumps when hovering over subject
Test API V3 WP forms endpoint
Process non-empty form requests
Fix context description
Extract resource link parsing
Remove superfluous dependency
Test WP form's status handling
Implement WP status update on API V3 WP forms
Test that API V3 WP endpoint differs read/write access
Fix line length
Test status processing for API V3 WP endpoint