Bug 9651 - When deleting a fund, button is wrongly labelled with 'Delete this budget'

Bug 9651 - When deleting a fund, button is wrongly labelled with 'Delete this budget'

This patch change legends to approve/cancel deletion of a fund.
Changed to Delete/Cancel, same messages to delete a Budget.

To test:
1) When deleting a fund, confirmation messages said:
'Delete this budget XXX?' to approve
'No, do not delete' to cancel
2) Apply the patch
3) Now the messages are 'Delete'/'Cancel'

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Works perfectly.

Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>