o.c.vtype.pv: Fix "unsubscribe" error message
o.c.alarm.beast.server: Fix maintenance mode for VType

Had not considered the new UNDEFINED severity. Treaded like INVALID.
o.c.alarm.beast.server: Use vtype.pv

PVManager resulted in missed alarms
o.c.alarm.beast: Update versions and changelog
o.c.alarm.beast.server: Console command "pvs partial_name"
o.c.alarm.server: Default to o.c.platform.libs.epics/monitor=VALUE
o.c.alarm.beast.configtool: Update schema to include automated action

.. and fix handling of component, pv which may follow in any order
Merge pull request #687 from ControlSystemStudio/bug685

Alarm server missed brief alarms; maintenance mode unaware of VType Severity UNKNOWN