Bug 21089: Overlapping elements in ordering information on acqui/supplier.pl

Bug 21089: Overlapping elements in ordering information on acqui/supplier.pl

This patch changes the HTML structure of the vendor edit page so that
the markup is a little simpler. CSS is modified to match. This structure
should serve as a model for other similar form structures:

 <fieldset class="rows">
     <ol>
         <li>
             <label>General label:</label>
             <label class="radio">
                 Specific label 1 <input type="radio" />
             </label>
             <label class="radio">
                 Specific label 2 <input type="radio" />
             </label>
         </li>
     </ol>
 </fieldset>

To test, apply the patch and regenerate the staff client CSS.

 - Go to Acquisitions -> Vendor search -> Vendor -> Edit vendor
 - In the "Ordering information" section, confirm that the position of
   radio buttons looks correct.
 - Confirm that radio button labels work correctly.
 - Confirm that the adjacent dropdown menus work well.

Signed-off-by: David Cook <dcook@prosentient.com.au>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>