lion/.changeset/hip-pigs-type.md

@lion/input-datepicker	@lion/overlays
minor	minor

• ArrowMixin needs to extend styles and not overwrite them
• ArrowMixin add an _arrowNodeTemplate which can be used to only override the arrow content
• InputDatepicker switch between bottomsheet style (on mobile) popover (on desktop/table with screensize bigger then 600px)