* Add default duration and color to appointment type
When creating a Patient Appointment, the Duration field will be populated when the Appointment Type is set. This is preserved when checking availability and booking an appointment.
`Appointment Type.color` is used in the calendar display.
* Remove accidental fixed date from git
* Update modified timestamp to ensure migrations.
Set to the timestamp of dd506a0961437540872c01d3487b8e37806c0bb0