Wrap multi record custom field inside a div

[pradpnayak]

Overview

When a profile has multi-value custom field with 'Include in multi-record' checked, On profile edit mode the multi record listing appears at the bottom of the profile. Adding css or js for the section is difficult because its not wrapped inside a element. This PR wraps the whole html code inside a div with a class.

Before

After

[civibot]

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[adevapp]

Have tested. Works as expected. Am able to assign CSS styling to multi record div now.

[eileenmcnaughton]

Absent a clear-standard on this I think I'll go with 'seems harmless, let's merge'

ping @vingle @agh1