Thermo Label location adjustment

Summary:
Adjust label location based on widget size

smallest size: To small to fit name in the widget or under it.

medium sized: Wide enough to fit name inside but not tall enough to fit the name on the button

Largest Size: Can fit the label on the the bottom of the widget.

Reviewers: tcanabrava, laysrodrigues, patrickelectric

Reviewed By: laysrodrigues

Subscribers: Atelier: General Development

Tags: Atelier: General Development

Differential Revision: https://phabricator.kde.org/D12268