Allow customization of Release info in new Drawer layouts

Currently, Releases that are linked to Initiatives have a fixed field layout (Release name, Pending epics, Completed epics, & Status) I would like to have the ability to change the columns that are displayed.

The epic columns end up being less useful when updating the Progress by Releases since the epic completion status is taken int account.

For my purposes, Release date would be more useful as it would give me information, at a glance, whether something is due soon or later.