Milestones: Custom Labels, Classifications and field-level view/edit options

Milestones have increased configurability with:

1. Ability to add Classifications
2. More Custom Labels
3. Turn Fields On/Off, Required, or Read Only

Admins can configure Milestone Classifications similar to other objects:

New custom labels for fields such as Start Date and End Date are now available:

Field Level Options also now available for Milestones