var names of type {Property} must have a 'Property' suffix

[pixelzoom]

Related to code review #173.

In ModeListParameterList:

/**
   *
   * @param {Property<boolean>} playButtonPressed
   * @param {Property<boolean>} gravityEnabled
   * @param {Property<boolean>} stepping
   * @param {Property<boolean>} rewinding
   * @param {Property<number>} timeSpeedScale
   * @constructor
   */
function ModeListParameterList( playButtonPressed, gravityEnabled, stepping, rewinding, timeSpeedScale ) 

Per PhET naming conventions, all of these parameters must be renamed to have a Property suffix. Eg:

playButtonPressed -> playButtonPressedProperty

[pixelzoom]

Same problem in GravityAndOrbitsClock, CartoonModeList and RealModeList.

[aaronsamuel137]

I've made these changes, assigning to @pixelzoom for review.

[pixelzoom]

Spot checked, looks good, closing.