* Add fieldsetClasses prop
* Fallback to an empty string if value is undefined
* Fix focus ring to be consistent with our other custom focus rings
* Fix placeholder color
We fixed the input component and added a character counter to it, so we don't need a separate CharLimitedFieldSet anymore.
The input component has been simplified to *just* be an input component, so it no longer displays an error. We will make a new component for error handling and labeling. It will probably be an improvement on our custom Fieldset somehow.
