Bug 15746: Same fix for "write off"

Bug 15746: Same fix for "write off"

Same fix as before for the "Write off" button next to the "Pay" button.

Signed-off-by: Hector Castro <hector.hecaxmmx@gmail.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Brendan Gallagher brendan@bywatersolutions.com
(cherry picked from commit efad45a0e39703017a894d3ffdd1a7078d13af60)
Signed-off-by: Julian Maurice <julian.maurice@biblibre.com>
(cherry picked from commit 9973f0e986abf1db68dc177369f85126f77230d2)
Signed-off-by: Frédéric Demians <f.demians@tamil.fr>