This folder is for genuinely shared stuff only.

If your code is the only code using a module that you want to put in
here:

- Don't put it in here
- List it below as "potentially shared"

Potentially shared
------------------

These modules are potentially shared but only used in one feature.  If
you can use one of them in your feature, please move it into this
directory and update the require paths in the other feature.

- app/jsx/theme_editor/RangeInput.jsx

