Bug 21945: Clean up stock rotation template

Bug 21945: Clean up stock rotation template

This patch makes some minor markup upgrades to the stock rotation
template: Replace some YUI markup with Bootstrap; Add some missing <tr>
tags; Remove invalid "type" attribute from <script> tag.

To test, apply the patch and go to Tools -> Stock rotation. Confirm that
the page looks correct and adjusts well at various browser widths. Test
with various views: New rota, edit rota, manage stages, manage items.

Signed-off-by: Jose-Mario Monteiro-Santos <jose-mario.monteiro-santos@inLibro.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>