[WIP] First pass of MirrorInputValue component
Fix final :failing tests
Improve test description
Add MirrorInputValue Dough component

For SEO Title feature. Includes JS tests, Dough component Ruby helper (@dougdroper)
id:4373
JS linting
Remove line break
Improve test descriptions
Merge pull request #46 from moneyadviceservice/mirrorinputvalue-component

Mirrorinputvalue component