Bug 21307: (follow-up) QA fixes

Bug 21307: (follow-up) QA fixes

This patch corrects a couple of issues discovered by QA: Removed markup
copy-and-paste error; Add some CSS to help the responsive behavior of
the advanced editor controls at smaller browser widths.

To test, apply the patch and open the advanced MARC editor. Test the
appearance of the page at various browser widths. At narrower widths the
status bar and search fields should behave well.

Signed-off-by: Michal Denar <black23@gmail.com>
Signed-off-by: Michal Denar <black23@gmail.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>