Bug 964981 - Making sure the contact details view-body has a background
matching the inner-body since the inner-body gets translated and might
reveal the view-body below.
Merge pull request #15875 from etiennesegonzac/bug-964981-contact-details-background

Bug 964981 - Making sure the contact details view-body has a background r=arcturus
Bug 959696 - [Messages][Drafts][Refactoring] Move draft saving on visibility change to ThreadUI, and only store drafts if new one is saved r=rwaldron