Bug 8070: improve MARC preview display for RTL languages

Bug 8070: improve MARC preview display for RTL languages

The Right Answer, according to the cataloger I spoke to,
is to make it LTR when doing "raw" MARC display.

To test:

1) Install this patch, then run misc/translator/translate install ar-Arab
2) search for a bib in the staff client.
3) Switch to Arabic, and click the link to the left of "MARC Preview"

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
At first glace I was unsure about hard-coding this style in the
template. Further testing indicated that this is required as the
showmarc template doesn't inherit any of the CSS from the containing
page.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>