$block->getTotals() is not countable

[MoT3rror]

Description

Fix issue where $block->getTotals() is not countable in Magento/Sales/view/adminhtml/templates/order/totalbar.php
getTotals() is set to protected in block not allowing template to access the method.

Manual testing scenarios

1. Setup check payment method.
2. Place order on frontend.
3. Attempt to process invoice in backend.
4. Unable to process invoice because of PHP error.

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)

[magento-cicd2]

All committers have signed the CLA.

[magento-engcom-team]

Hi @MoT3rror. Thank you for your contribution
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[magento-engcom-team]

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[orlangur]

@MoT3rror is this issue reproducible in 2.2-develop? Any contribution should be merged into it first.

[dverkade]

I can reproduce this issue on Magento 2.3 Alpha and have created issue #16653 for this. However the changes introduced in this PR are not resolving the issue. It will display some totals in a weird place which should not be displayed there. Please see attached screenshot below.

[orlangur]

Closing in favor of #16656