Print view broken with overflowing container

[menelaos]

This plugin in conjunction with redmine 5 causes some issues when printing pages that contain overflowing elements. In particular, it causes the left-hand side of the page to be cut off.

Steps to reproduce:

1. Setup redmine according to https://redmine.org/projects/redmine/wiki/RedmineInstall
2. Install redmine_hide_sidebar
3. Start redmine
4. Visit http://localhost:3000/projects
5. Open DevTools and add the following element as a sibling to <h2>Projects</h2>:

   <div style="white-space: nowrap; width: 1800px; overflow-x: scroll;">
     Sed ut perspiciatis unde omnis iste natus error sit voluptatem
     accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae
     ab illo inventore veritatis et quasi architecto beatae vitae dicta
     sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit
     aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos
     qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui
     dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed
     quia non numquam eius modi tempora incidunt ut labore et dolore magnam
     aliquam quaerat voluptatem. Ut enim ad minima veniam, quis nostrum
     exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex
     ea commodi consequatur? Quis autem vel eum iure reprehenderit qui in
     ea voluptate velit esse quam nihil molestiae consequatur, vel illum
     qui dolorem eum fugiat quo voluptas nulla pariatur?
   </div>

6. Print page on A4
7. See that the "Projects" header is not visible and the left side (beginning) of the page is cut off:
   

Possible fixes:

If I remove width: auto in

redmine_hide_sidebar/assets/stylesheets/redmine_hide_sidebar.css

Line 49 in 9b00777

width: auto;

and

redmine_hide_sidebar/assets/stylesheets/redmine_hide_sidebar.css

Line 64 in 9b00777

width: auto;

, the page prints as expected: