Fix issue with inline not working on Toggle

[holmesadam]

The Toggle field is passed an is-inline option. is-inline is a boolean. optional() ignores null|false and therefore the Toggle can never be set as not inline i.e. ->inline(false)

This fix addresses that error.

[what-the-diff]

PR Summary

• Safeguarded the use of 'is-inline' option
  Ensured that this option was actually available before utilizing it in the configuration of the component. This was achieved by changing the condition to check if 'is-inline' exists first.