Bug 21346: Remove inline onclicks per comment 42

Bug 21346: Remove inline onclicks per comment 42

To test:
1)  Apply patch.
2)  Check that there is no changed behavior with buttons or checkboxes.

Signed-off-by: Liz Rea <wizzyrea@gmail.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
(cherry picked from commit d5d4501290704b9b3a0893a4a3df0a356abe445b)
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
(cherry picked from commit a1f80ad2950ea100e34260be7ae7d6e7f6f3bea7)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>