Refactor confusing LESS variables

Review Request #6823 — Created Jan. 22, 2015 and submitted — Latest diff uploaded

Information

Review Board
master
34cb271...

Reviewers

Several duplicated references of same css definition makes the code confusing and without obvious code clarifying benefit.

Kept @review-request-action-primary-* and @review-request-action-menu-* variables as they do not cause confusion.

Visually checked through. Ran tests.