v0.27.0-13

• Fix <CheckboxGroup /> not passing the correct onChange fn down 8acb4c8
• Lower modal z-index to give precedent to notifications 86eb56a
• Refactor CSS size variables for scalability 3c17dc4
• Add priority prop to <Btn />, <Input /> and <Select /> 7a0a86b
• Update icon-search to face the correct direction 7f272a0