Refactor Donations Steps

[sagararyal]

Remove the current steps implementation &step=contact and &step=donation

• Instead when a user continues to next page (Contact) append: units=xy and country=XY
• On Contact Page rename button to Continue to Payment

In this step POST /donations is created.
When the continue button is clicked, block the button, and wait for the response of the Create Donation API Call and upon receiving a successful response, redirect the user to
/?context=don_guid

For donations, that do not require multiple steps, after donation is paid, user should be redirected to /?context=don_guid as well

[mohitb35]

In #307 we've introduced a planet cash signup form which is linked to step 4 (PaymentStatus). This should also be considered for the refactor.

#307 (comment)

#307 (comment)