Equipotential isn't translated to state simulation

[JRomero0613]

Test Device: PC Laptop

OS: Windows 10 v. 1803

Browser: Google Chrome v. 67.0.3396.87

Problem Description: For phetsims/qa#128 when using the state wrapper with the simulation and drawing the region of equipotential, the equipotential is not translated to the smaller sim. In v. 1.0.1-rc.1 no equipotential line is drawn at all in the smaller sim. In master the first equipotential line is drawn in the smaller sim, however any lines afterwards are not drawn. After no more equipotential lines are drawn changing the options such as electric field and grid are not translated to the smaller sim.

Screenshot: The first screenshot is of version 1.0.1-rc.1 where no equipotential lines are drawn in the smaller sim.

The second screenshot is of the master version where the first equipotential line is drawn.

[zepumph]

Looks like the version in master and https://phet-io.colorado.edu/sims/charges-and-fields/1.0.0-phetio/wrappers/state/state.html?sim=charges-and-fields isn't storing state either. This will be worked on when the next phet-io release out of master takes place. Renaming to remove version specific suffix, and unassigning.

[phet-steele]

The error I receive:

Uncaught Error: Assertion failed: addChildInstance should have registered element: chargesAndFields.chargesAndFieldsScreen.model.electricPotentialLines_0
    at window.assertions.assertFunction (assert.js:22)
    at create (phetio.js?bust=1531935073868:181)
    at phetio.js?bust=1531935073868:240
    at Array.forEach (<anonymous>)
    at iterate (phetio.js?bust=1531935073868:237)
    at Phetio.setState (phetio.js?bust=1531935073868:274)
    at PhETIO.implementation (PhETIO.js?bust=1531935073868:197)
    at PhetioCommandProcessor.invoke (phetioCommandProcessor.js?bust=1531935073868:261)
    at PhetioCommandProcessor.handleSingleInvoke (phetioCommandProcessor.js?bust=1531935073868:119)
    at PhetioCommandProcessor.handleRequest (phetioCommandProcessor.js?bust=1531935073868:160)