System messages are visible on printed pages

[Oleg Frantsuzov <franoleg@…>]

After a successful operation, e.g. saving of a wiki page, a system message is displayed on top of the page.

For some reason, this message is still visible if the page is printed.

Consider the following scenario:

1. The user is modifying or creating a wiki page, and wants to print it (or save as PDF) when done.
2. Having clicked Save, the user prints the page.
3. On the hard copy, the message "Your changes have been saved" is displayed.

[Oleg Frantsuzov <franoleg@…>]

Patch against 0.12-stable fixing the defect

[Remy Blank]

This makes sense, thanks for the patch. I have also wanted to add a small "close" button at the top-right of those boxes for a long time (currently I simply reload the page), but that's independent.

[Remy Blank]

I have removed the warning and notice boxes from printing in [11055] (using their ID, though, because we use the .system-message class in other contexts, e.g. errors due to wiki rendering).

And while I was at it, I added a small "[close]" link at the top-right of these boxes, to allow the user to hide them.