Add a button to print the replay frame

[krakan]

Description

Add a button to print the content of the replay iframe to the list of buttons in the page banner.

Motivation and Context

Printing the content of an iframe is not straight forward in any browser although some are better than others. This change makes it trivial to print the archived pages.
This is particularly important in our case as printing and viewing are the only allowed processes for an archived page.

Screenshots (if appropriate):

The print button with mouse over effect:

Types of changes

• Replay fix (fixes a replay specific issue)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added or updated tests to cover my changes.
• All new and existing tests passed.

[tw4l]

Looks great and layout still looks good at all screen sizes/breakpoints - thanks @krakan ! I'm going to add an option to config.yaml to disable printing in certain context where it might not be encouraged (e.g. reading rooms), but will keep it enabled by default.