Fixing expired/cancelled dates for old members in Members List

[dparker1005]

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Changes proposed in this Pull Request:

Fixed issue where the expired/cancaellation date would be empty for old members in the Members List.

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[ideadude]

Is this a case where the pmpro_sanitize_with_safelist function could work? How does is that function handled by the Plugin Checker security check now. If we need to sanitize the input or add a comment to negate the scan, we kind of lose the efficiency of using our function. I still like the readability of using our function RE what is happening.

I'd be fine either way. Just wanted to call this out.

https://github.com/strangerstudios/paid-memberships-pro/blob/dev/includes/functions.php#L3668-L3681