Fix warnings when priority not set in form field.

[pgk]

The following php 8 warnings were reported

PHP Warning: Undefined array key "priority" in wp-job-manager/includes/abstracts/abstract-wp-job-manager-form.php on line 302
PHP Warning: Undefined array key "priority" in wp-job-manager/includes/abstracts/abstract-wp-job-manager-form.php on line 299

Changes Proposed in this Pull Request

• Fixes warnings by ensuring that the priority key exists, otherwise "punishes" the fields that have no priority.

Testing Instructions

• On a php8 setup remove one priority key from a form field. I did it in the forms used in add-a-job.
• Test that warnings do not show.
• The field should go to the bottom of the form.

Release Notes

New or Updated Hooks and Templates

*

Deprecated Code

*

Screenshot / Video

---

Plugin build for 74e76c0f498803fcd42f1640d96c7a5af24797b3
📦 Download plugin zip
▶️ Open in playground