fix: MdTooltip missing controls in Storybook

[aurorascharff]

Describe your changes

The Storybook docs for MdTooltip did not have updated controls. Added missing controls, fixed minor CSS issue and added tertiary theme to MdButton README example docs.

Checklist before requesting a review

• I have performed a self-review and test of my code
• I have added label to the PR (major, minor or patch)
• If new component: Is story for component created in stories-folder?
• If new component: Is tsx-file import added to packages/react/index.tsx?
• If new component: Is css-file added to packages/css/index.css?

[github-actions]

Please set a versioning label of either major, minor, or patch to the pull request.