Allow long elements such as dropdowns escape modals

[btecu]

Proposed changes

When including a long dropdown (select) in a modal, if the dropdown list is longer than the modal, it will be constrained inside the modal. The change allows such elements escape the modal.

Screenshots:

Before:

After:

Types of changes

• Bug fix (non-breaking change which fixes an issue).
• New feature (non-breaking change which adds functionality).
• Breaking change (fix or feature that would cause existing functionality to change).

Checklist:

• I have read the CONTRIBUTING document.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.