Form Autopopulate Doesn't Decode Email Correctly

[JasonBroderick]

User Story

As an admin I want to pass a URL encoded email address and have it correctly populate the email field in my Give forms, e.g using merge fields to pass email address to the form url from my email service provider.

Details

URLs with encoded email addresses do not correctly decode %40 as @ and so email fields are being populated incorrectly.

Example

example.com/donations/form/?email=JWayne%40wpimpress.com

Email: JWayne%40wpimpress.com

Expected Behavior

Email should be decoded correctly to:

JWayne@wpimpress.com

Steps to Reproduce

1. After installing snippet, on any form url add the query param "?email=JWayne%40wpimpress.com"
2. Skip to email field...
3. See incorrect email, with %40 instead of @

Acceptance Criteria

• [ ] Javascript decodeURI should be updated to decodeURIComponant, (at least on line 56, for email)
• [ ] Query param "?email=JWayne%40wpimpress.com" should now populate JWayne@wpimpress.com in email field.