[Bug]: form-control-sm input text is not vertically centered in single-select mode

[dcongrove-td]

Bug description

When using Tom Select with the form-control-sm class for a single-select input, the text inside the input field is not vertically centered. It appears that the input is using the normal padding instead of the smaller input-sm padding. This issue is also visible in the documentation example on the Tom Select website.

Expected behavior

The text inside the form-control-sm input should be vertically centered and consistent with Bootstrap's input-sm padding styles.

Steps to reproduce

1. Visit the Tom Select styling examples page.
2. Scroll to the "form-control-sm (single)" example.
3. Observe that the text within the input is not vertically centered.

Additional context

Bootstrap v5.3.3