Make email notifications easier to parse

The current email notifications are really quite poor in terms of ability to quickly parse.

The Status: should be one of the first things in the email, and it should always be in the same place, not moved around following the file directory path. Ideally, it should go beneath the Schedule:.

Likewise, for schedules with multiple steps, there should be an “All steps of scheduled backup successfully completed” or similar. If it’s a success, I don’t even really need the line-by-line logs.