Living Style Guide: Document watchers tab

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Move concrete .hidden-for-sighted from legacy Sass

Use @extend rather than separate mixin to share behaviour.

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Fix userField template markup structure

Template markup added in fe5ea78d did not match Style Guide example.

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Fix display of user avatar, delete on watchers tab

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Remove superfluous avatar styles

Signed-off-by: Alex Coles <alex@alexbcoles.com>