set alignment purchase order form and place order button

[neeta-wagento]

Description

Purchased Order Form button should visible properly

Fixed Issues (if relevant)

1. Purchased Order Form button should visible properly #15334 Purchased Order Form button should visible properly

Manual testing scenarios

1. Enable Purchase Order Payment Method from Admin
2. Add Product to cart
3. Go to Checkout
4. Enter Address Details and select Shipping Method
5. Go to Review and Payment Method

Actual Result

Expected Result

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)

[vijay-wagento]

#dmcdindia

[arshadpkm]

@neeta-wagento Please update the description with issue number

[neeta-wagento]

@arshadpkm I have update the description with issue number.

[magento-engcom-team]

Hi @neeta-wagento. Thank you for your contribution.
Changes from your Pull Request will be available with the upcoming 2.2.5 release.

Please, consider porting this solution across release lines.
You may use Porting tool to port commits automatically.