Bug 23354: (follow-up) Responses to feedback

Bug 23354: (follow-up) Responses to feedback

This patch impliments a number of refinements requested after the first
round of feedback from the sponsors.

1) Fix padding on pay page
2) Switch 'items to add' from right to left on the page
3) Fix editable columns on pay page
4) Add explanitory text to pay page

Sponsored-by: PTFS Europe
Sponsored-by: Cheshire Libraries Shared Services
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>