Tandem name should match associated variable/field name

[pixelzoom]

For code review #41 ...

By PhET-iO convention, tandem names are typically supposed to match their associated variable/field name (with exceptions made for unusual cases). There are at least 5 violations of that in this sim, and none of them qualifies as "unusual".

For example, in MeanShareAndBalanceScreenView.ts:

this.syncDataButton = new RectangularPushButton( {
...
      tandem: options.tandem.createTandem( 'syncRepresentationsButton' ),

I added comment "//REVIEW tandem name does not match" to all of the cases that I identified. (Not necessarily a complete list.)

[marlitas]

Did a search and fixed all the instances I was able to find. Back to @pixelzoom for re-review.

[pixelzoom]

👍🏻 closing.