WPForms Custom Captcha Addon 1.8.0

## Changed
- Do not add a second question with an empty question and answer values that were added by default.
- Empty questions are now removed from the list on form save.

## Fixed
- Implemented various fixes to prevent questions with an empty question or answer values from being saved or displayed.

### Added
- Compatibility with WPForms 1.7.1 and displaying the field on Entry Edit page.
- Compatibility with WPForms 1.7.3 and Form Revisions.

## Changed
- Prevent saving empty values for "Question and Answer" Captcha fields.

## Fixed
- Compatibility with WPForms 1.6.8 and the updated Form Builder.
- Incorrect "Math" Captcha preview in the Block Editor (Gutenberg).
- Incorrect "Question and Answer" Captcha preview in Builder.