[Eventing][UI] Part of error message chopped off on Safari

STEPS TO REPRODUCE

1. Create 2 buckets namely src_bucket and metadata.
2. Create default eventing handler using above mentioned buckets.
3. Remove entire JS code within function editor and click on Save/ Save and Return.

OBSERVATION
On Safari part of the error message is getting chopped off.

On Chrome/ FF entire message is displayed in form of scroll bar.