Restoring flow updates

[DKeatonDC]

Critical Changes

Adds usability to setup flow that were initially part of PR #189 and #147. #196 attempted to address but encountered build issues.

Changes

Several changes to the setup flow to address multiple Issues: flow usability and design updates, fonts, button labels, flow element sizing consistent for display in Lightning Page; added welcome screens and instructions depending on first time or re-entry ; added help text on Company Name to describe its use ; next button language is now consistent, this was already resolved )

Issues Closed

#93
#102
#144
#147
#177

[acrosman]

@DKeatonDC you'll need to also recreate the fixes from these updates:

• https://github.com/SFDO-Community/UnsubscribeLink/pull/199/changes#diff-2c779738744716c38feb61cd6164d1d45a2a8d59615a1b867dec46ae7bfd9a44R12
• https://github.com/SFDO-Community/UnsubscribeLink/pull/200/changes#diff-c70135ebef51c00947ebff59bd47764c09fa9ccbd1c6c28611776851b9850145R7
• https://github.com/SFDO-Community/UnsubscribeLink/pull/200/changes#diff-b01f9374f6cc69f1d6b5f14f3c86dd1989076895b0d9d688f8fdddf35296acc6R7

That should unpin the workflows.

[DKeatonDC]

@DKeatonDC you'll need to also recreate the fixes from these updates:

* https://github.com/SFDO-Community/UnsubscribeLink/pull/199/changes#diff-2c779738744716c38feb61cd6164d1d45a2a8d59615a1b867dec46ae7bfd9a44R12

* https://github.com/SFDO-Community/UnsubscribeLink/pull/200/changes#diff-c70135ebef51c00947ebff59bd47764c09fa9ccbd1c6c28611776851b9850145R7

* https://github.com/SFDO-Community/UnsubscribeLink/pull/200/changes#diff-b01f9374f6cc69f1d6b5f14f3c86dd1989076895b0d9d688f8fdddf35296acc6R7

That should unpin the workflows.

Including the changes that rename the templates?

[salesforce-cla]

Thanks for the contribution! Before we can merge this, we need @dirkkeaton to sign the Salesforce Inc. Contributor License Agreement.