Follow-up on T120154: Align commonPrint.css to (most) CSSLint errors&warnings and WMF's CSS Coding guidelines and cleanup:
Proof and fix overqualified selectors and use of !important in current commonPrint.css where applicable.
Currently CSSLint returns 60 warnings:
- 16 overqualified selectors
- 16 usage of !important
- 16 usage of ID in selectors