[ENH] Silently fail when a formula fails executing while processing events, as event handlers should not fail
[ENH] Silently fail when a formula fails executing while processing events, as event handlers should not fail

git-svn-id: a7fabbc6a7c54ea5c67cbd16bd322330fd10cc35@47278 b456876b-0849-0410-b77d-98878d47e9d5

tikiorg/tiki,tikiorg/tiki,oregional/tiki,changi67/tiki,oregional/tiki,changi67/tiki,oregional/tiki,oregional/tiki,tikiorg/tiki,changi67/tiki,tikiorg/tiki,changi67/tiki,changi67/tiki