Bug 25242: Improve column wrapping and overflow for tables

Bug 25242: Improve column wrapping and overflow for tables

This patch attempts to improve the column wrapping and prevent
datatabels from overlapping with other content on high zoom levels/low
width screen sizes.

Test plan
1/ Build the OPAC CSS from the updated SCSS
2/ Navigate to various tables in the OPAC (Holds table is a good one)
and 'play' with various window sizes and zoom levels.
3/ The table should not overlap with right navigation content
4/ Signoff

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>