Reassociate timed triggers after instrument resets

[amcmahon01]

Description

Currently, if a timed trigger is running and an instrument is reset, the timer continues running and as a result the old instrument object continues to exist since there is still an active reference to it. This results in both instrument objects attempting to run simultaneously and the original timed trigger cannot be stopped.

Possible Implementation

Timed trigger objects should be stopped and destroyed during instrument reset so that the instrument object can be properly destroyed without lingering references. Optionally, the status of the timer (running or not) could be transferred to the new object, but given that some instruments need manual initialization, this is probably best done manually.