METRO-58: Modifications to metro mods form to change subject section int...

METRO-58: Modifications to metro mods form to change subject section into subjects section and make it a tabpanel.  This change is required because of the way the objects imported over they have multiple sections for <subject>  including some that set the title authority in the subject tag directly as to in the <title> tag directly so the title subject can authority from either setting.

Ticket: https://discoverygarden.atlassian.net/browse/METRO-58