financial#71 - allow emailing partially paid invoices

[MegaphoneJon]

Overview

The "Email Invoice" functionality is hard-coded to not send partially paid invoices, even though the default invoice template supports them correctly.

Before

Can't email a partially paid invoice. You get the error Please select only contributions with Completed, Pending, Refunded status..

After

Partially paid invoices are emailed successfully.

Technical Details

If the PR introduces noteworthy technical changes, please describe them here. Provide code snippets if necessary

Comments

Steps to replicate:

• You need to enable tax/invocing under CiviContribute Component Settings
• Create a pending contribution on the back end.
• Record a partial payment on the contribution.
• View the contribution and press "Email invoice".

[civibot]

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[MegaphoneJon]

Eileen overruled me last time, but I genuinely think this qualifies for the easy-review tag.

[eileenmcnaughton]

Lol - yes seems fine to me - test fail is unrelated