Bug 21966: Fix descriptions of acquisition permissions to be more clear (again)

Bug 21966: Fix descriptions of acquisition permissions to be more clear (again)

This was already done and pushed on bug 3849, but some of it got
undone accidentally by a later patch.

To test:
- Check the acquisition permissions
- The *budget* permissions should clearly describe their
  use for 'funds'.

Signed-off-by: Pierre-Marc Thibault <pierre-marc.thibault@inLibro.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>