Hide emails in CC fields on all tracs

[dd32]

As raised in Slack: ​https://wordpress.slack.com/archives/C02QB8GMM/p1582450533002400

Hi - During a theme review workshop last week some one asked if the theme authors email adress that is visible on the themes Trac could be hidden?

It seems odd that we expose theme author emails like this, so we should hide it them.

On Core & Meta Trac they're hidden through the usage of our Notifications functionality instead, I'm not sure how we can achieve it for Themes Trac but we should endeavour to do something about it.

Noting that on Core.Trac we're using [blackmagic] cc.disable = true and that I think the emails are visible because all Authenticated users have the TICKET_EDIT_CC cap in Trac, where as for unauthenticated users it's truncating and only showing the first part of the email address.

[acosmin]

@dd32 Could you please allow it to be visible to those with higher rank, like TRT admins? It's useful to us when searching for multi-accounters.

[dd32]

#7001 was marked as a duplicate.