fix: move tabindex attrs to button from within
fix: move tabindex attrs to button from within

We move the `tabindex` attributes to the button element directly from
elements contained within the button element – this is to satisfy the
HTML linter.

Changelog-Entry: Move tabindex attributes to button elements from
contained elements.
Change-Type: patch

resin-io/etcher,resin-io/etcher,resin-io/etcher,resin-io/etcher,resin-io/resin-etcher,resin-io/herostratus,resin-io/herostratus,resin-io/resin-etcher,resin-io/etcher