Bug 22399: Improve responsive behavior of the basic marc editor

Bug 22399: Improve responsive behavior of the basic marc editor

This patch makes markup and style changes to the basic MARC editor in
order to improve the page's handling of smaller browser widths. It adds
Bootstrap grid markup to the form to help accomplish this.

To test, apply the patch and load a record for editing in the basic MARC
editor. Adjust your browser width and confirm that the form adjusts well
to various widths.

Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>