Bug 20668: Update two-column templates with Bootstrap grid: Acquisitions part 2

Bug 20668: Update two-column templates with Bootstrap grid: Acquisitions part 2

This patch modifies several acquisitions templates to use the Bootstrap
grid instead of YUI.

This patch also removes obsolete "text/javascript" attributes from
<script> tags in the modified templates.

Staff client CSS is modified in this patch so that elements which were
styled based on the sidebar's "yui-b" class will work with <aside>.

To test, apply the patch and view the following pages, confirming that
they look correct at various browser widths:

- I don't have EDI set up, so to test acqui/edi_ean.tt I navigate
  directly to /cgi-bin/koha/acqui/edi_ean.pl. It's only the page
  structure we're worried about.
- Acquisitions -> Orders search
- Acquisitions -> Vendor -> Invoices -> Invoice search
  - View an invoice
  - Manage invoice files (Preference AcqEnableFiles must be enabled).
- Acquisitions -> Late orders

Patch applies and operates as described.
Signed-off-by: Dilan Johnpullé <dilan@calyx.net.au>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>