Bug 32914: Use template wrapper for batch record deletion and modification templates

Bug 32914: Use template wrapper for batch record deletion and modification templates

This patch updates the batch record modification and batch record
deletion templates to replace tab markup with the use of WRAPPERs.

This patch adds a "clearfix" snippet of CSS to _mixins.scss copied from
Bootstrap. Applied to the active tab pane, this helps in situations
where Bootstrap tabs follow a floated element.

The patch also wraps tab label strings in <span> to ensure they can be
translated.

Unrelated: The patch removes an extra </option> from the batch record
modification template.

To test you should have at least one list and at least one MARC
modification template defined.

- Apply the patch and go to Cataloging -> Batch record modification
- You should see three tabs, "Upload a file," "Select a list of
  records," and "Enter a list of record numbers."
- The tabs should look correct and work correctly.
- Checking the "Authorities" radio button should hide the lists tab.
- Test that submissions from each form work correctly.

- Go to Cataloging -> Batch record deletion and perform the same tests.

Signed-off-by: Philip Orr <philip.orr@lmscloud.de>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>