Font-size of select element inside braveryControlGroup was set to 13px

[luixxiul]

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
• Ran git rebase -i to squash commits (if needed).

Closes #5772

Auditors: @bradleyrichter

Test Plan:

1. Open the bravery panel
2. Make sure that the font-size of select element inside braveryControlGroup was set to 13px

[bbondy]

@bradleyrichter could you confirm?

[bradleyrichter]

@bbondy Yes. 13px is the correct and desired font size.