Usability on small screens review

[KatieWoe]

Per @kathy-phet's request in phetsims/qa#295 I am making issues in each published sim repo detailing the pointer areas and usability of sims on phone sized screens. Done on an iPhone 7 iOS 12 device.

Potential Difficulties Noticed:

• In landscape mode the blue pointer area for the concentration tool looks odd

Screenshots:

[pixelzoom]

This sim is identical to the Concentration screen in Beer's Law Lab, so I would expect this issue to be a duplicate (subset) of phetsims/beers-law-lab#236.

[arouinfar]

Thanks @KatieWoe.

From a design perspective, I would make the same decisions about the touch areas for Concentration and the Concentration screen of Beer's Law Lab. From what I understand about the code, it all lives in the beers-law-lab repo, and any change made to BLL would automatically apply to Concentration. If this is true, I think this would be safe to close @pixelzoom.

[pixelzoom]

Yep, it all lives in beers-law-lab, and anything we do there applies to concentration. So closing as duplicate.