Use `\A` and `\z` as anchors in email validator regex to match with whole string (catches new line characters; also: prevent malicious input from being saved before or after a new line character). Fixes #3212.
Use `\A` and `\z` as anchors in email validator regex to match with whole string (catches new line characters; also: prevent malicious input from being saved before or after a new line character). Fixes #3212.

techvalidate/pano,techvalidate/pano,techvalidate/pano