Email Logs list breaks down with woocommerce_email_recipient_ hooks

[teemujonkkari]

Adding recipients with woocommerce hooks breaks logging in plugin.

Example recipient string: "first.name@gmail.com, last.name@gmail.com"

In browser

• Console: TypeError: Cannot use 'in' operator to search for 'length' in a:7:{i:0;a:1:{s:5:"email";s:19:"info...
• Network: "to" field in json response to: "a:7:{i:0;a:1:{s:5:\"email\";s:19:\"info...

Email sending works fine. Effects only in logging which breaks down completely.

[robertstaddon]

The a:7:{i:0;a:1:{s:5:"email";... string in the logs AJAX response is a PHP-serialized recipient list that was clipped by fsmpt_email_logs.to VARCHAR(255). Sending still works; the log row (and anything that foreaches to as an array) does not.

Tracked in #433, fix in #434.