Feature - License settings page

[riteelama]

All Submissions:

• Have you followed the Everest Forms Contributing guideline?
• Does your code follow the WordPress' coding standards?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Changes proposed in this Pull Request:

Previously, there was no option to view and manipulate the licence key. This PR adds the feature to Activate/Deactivate and view the license plan along with its expiry date.

Closes # .

How to test the changes in this Pull Request:

1. Go to Everest Forms Settings > License
2. You can view the field to enter the License Key
3. After that you can activate the license.
4. If your license is already activated, then you can deactivate it and check the license plan along with its expiry date.

PR Dependency

Types of changes:

• Bug fix (non-breaking change which fixes an issue)
• Enhancement (modification of the currently available functionality)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Other information:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you successfully ran tests with your changes locally?
• Have you updated the documentation accordingly?

Changelog entry

Feature - License settings page.