Remove variable "type" from timeseries outputs.

[robfalck]

Proposed feature.

Timeseries outputs prefixes the variable type to states, controls, and parameters. This can make plotting things an annoyance when a particular variable changes time from phase to phase to phase.

In 1.18.0, dymos will begin removing this prefix by default, with the option to reclaim the current behavior using

from dymos.options import options
options['use_prefix'] = True

...

This change will not affect most user input files, but may affect their output files.
This change will cause some necessary changes in how dymos loads in cases, since those methods currently rely on the presence of the prefix.

Example

No response