TMsvSendState in Messaging MSG

TMsvSendState

Defines sending state flags.

`KMsvSendStateUnknown`	State unknown.
`KMsvSendStateUponRequest`	Message will be sent on request.
`KMsvSendStateWaiting`	Waiting to be sent. Messages in the outbox with this state can be sent automatically by the relevant MTM once an appropriate connection is established.
`KMsvSendStateSending`	Sending in progress.
`KMsvSendStateScheduled`	Sending scheduled.
`KMsvSendStateResend`	Resending.
`KMsvSendStateSuspended`	Sending suspended.
`KMsvSendStateFailed`	Sending failed.
`KMsvSendStateSent`	Sending complete.
`KMsvSendStateNotApplicable`	Not applicable.

Enum TMsvSendState