Bug 32182: Replace static tabs markup with Bootstrap

Bug 32182: Replace static tabs markup with Bootstrap

This patch reimplements certain tabbed interfaces to use Bootstrap
markup. Previously these tabs required special CSS because they're
static, i.e. not JS-driven tabs for switching in-page. The tabs are
links to separate pages.

Note: This patch includes whitespace changes, so use diff accordingly.

To test, apply the patch and rebuild the staff interface CSS.

Test the following pages to confirm that the tabs look correct and still
link to the correct locations:

- Patron details
    - Accounting
      - Pay amount
    - Transactions
    - Create manual invoice
    - Create manual credit
- Tools -> Comments

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>