Change a bunch of checkbox onClicks to onChanges

The new React seems to not like when you use onClick on a checkbox (it gives
warnings). Probably the same situation as
https://github.com/Khan/perseus/commit/dd73d9a1386a2469b02a9b65fedbee99b7020c25

Test Plan:
* Open something affected (measurer?) and make sure it still works

Auditors: alex