1. make intl fields use [IntlValue] and [IntlValueInput] types
2. add isIntlData marker to fields storing intl data
3. only validate intl fields that are marked as required
4. remove all instance of `__typename` from documents in edit forms
- Moved UI portions of FormComponent to FormComponentInner.jsx in vulcan-ui-bootstrap
- Added user alert when the user navigates to another route while there are unsaved changed in the form (disabled by default)
- Added setting forms.warnUnsavedChanges and SmartForm property warnUnsavedChanges to enable user alert
- Added optional Revert button in FormSubmits to allow the user to discard any changes to the form; this is activated by passing a "revertCallback" property to SmartForm (which can be empty: () => {})
- Added two functions that form components can access in the child context: refetchForm() to refetch the document from the database (in case it was updated by a background process), isChanged() to determine if there are any unsaved changes
- For any phrases I have added to en_US.js I also added it to es_ES.js and fr_FR.js with the comment // TODO: translate
- Updated Form.clearForm and Form.mutationSuccessCallback so that the user can continue working on the document after submitting it
- The form now scrolls the flash message into view when a submit results in errors
- Fixed bugs in FormComponent.shouldComponentUpdate() and Form.getDocument()
- Fixed bug in FormComponent.handleChange() - number fields could not be cleared, only set to 0
- Fixed a bug in FormComponent.getValue() - it returned the initial value of a checkbox even after it was set to false, and a number even after it was set to 0
