FIO-9166 Fixed alignment for the buttons in formbuilder

[antonSoftensity]

Link to Jira Ticket

https://formio.atlassian.net/browse/FIO-9166

Description

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Checklist:

• I have completed the above PR template
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (if applicable)
• My changes generate no new warnings
• My changes include tests that prove my fix is effective (or that my feature works as intended)
• New and existing unit/integration tests pass locally with my changes
• Any dependent changes have corresponding PRs that are listed above

[brendanbond]

1. Even though this is a simple change, let's get in the habit of filling out the PR template.
2. This change seems fine, but is there any indication as to why it changed from 4.x to 5.x? Is there a gap in our USWDS template that needs to be addressed rather than an ad-hoc change to the SaSS?

[antonSoftensity]

@brendanbond it seems like the button classes were changed when USWDS was upgraded to 3.0, which led to that issue. So I believe this particular change is needed in our override stylesheet.