Button component cannot match height of form controls

[katydecorah]

When you put a select next to a button, all the Button sizes add either too much padding or not enough so that the two elements do not line up:

Size	Button
small
medium
large/default
What I want (just right 🐻)

To achieve the desired look we can use <button class="btn"/>.

Have we considered making the default <Button> component (without options) look like <button class="btn" />?