Select, multiselect & autocomplete styling fixes

[Jaanesen]

Describe your changes

For all three components: MdSelect, MdMultiSelect and MdAutocomplete I have fixed the following:

• labels can now be removed entirely, and padding will not be rendered.
• "chevron" is rotated when the dropdown is expanded
• size "small", is now the correct size, also in height.
• Select and mulitselect now has a dropdownHeight attribute so the max-height of the dropdown can be customized
• entire "box" of autocomplete is now clickable
• minor styling adjustments across all three components to prevent border-jumping/moving on expansion and focus.

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)

[github-actions]

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

[aurorascharff]

LGTM 👏