Links are displayed with full reference without color and styles are missing in the page Print Preview mode

Steps to reproduce

1. Go to Sandbox and Dashboard pages
2. Click on 'More Actions' > 'Print Preview'
3. Observe the elements/ styles displayed on each of the pages

Expected results

All elements are displayed like in normal View Mode: links are colored, displayed properly and styles of macros are present (like Info, Warning macros present on Sandbox page and events background on the Activity Stream on the Dashboard page (see the attached screenshots for XWiki 17.10.9).

Actual results

All links are displayed without color (in black) and have the full reference.

Also, the styles of the macros are missing: e.g. Info macros and the Warning macro on Sandbox and Activity Stream on Dashboard.

The issue could be reproduced also on XWiki 18.6.0-SNAPSHOT and on XWiki 18.4.0, but could not be reproduced on XWiki 17.10.9 (please see the attached screenshots).