CCing multiple addresses in BUI

Summary:

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In the .net version we used to be able to enter several email addresses separated by a semicolon in the cc field. I don't see a way to do this in BUI. Every time I enter an email address in the cc field, I am forced to hit enter after every address and then check a box with the address I wish to use. This is very cumbersome. I have a string of ten emails addresses that I frequently copy. I'd like to just copy and paste this into the cc field as I used