Improved "deadlock only" working

[revk]

Original design was door is locked when closed and uses fob to open.

However, the system can working a deadlock only mode where door may open/close, etc, but is not locked (i.e. no unlock output defined), and may then separately be deadlocked to engage locking on the door.

This mode is not handled that well, so some changes...

• Add new SHUT state for door closed properly but not actually LOCKED as no unlock output defined
• Make LEDs cleaner, amber for SHUT
• No need for any initial fob action when in SHUT mode
• Make the LED sequence for arming/deadlocking from SHUT cleaner
• Manual opening can log forced in some cases when from deadlock even if a disarm is done, handle better