BHV-693: Fix/optimize ToggleButton
Remove test prop in ToggleButtonSample
Merge pull request #1289 from enyojs/BHV-693-jeremythomas

BHV-693: Fix/optimize ToggleButton

Looks good! I'll try to follow up with UX regarding #6 but I think this works for now.

Reviewed-by: Aaron Tam (aaron.tam@lge.com)