The best candidate is `aria-label`, followed by `description`.
Most of the existing elements already have these defined, so try to route it as the tooltip instead of having to explicitly define tooltips everywhere through a redundant `title` or <Tooltip> tag.
Minor side-effect:
This will cancel off any effect from a parent <Tooltip>, i.e. might confuse future developers who are trying to do "<Tooltip><Button></Button></Tooltip>".
* am I done?
* post diff
* unused selector cleanup
* missed commit
* mess with button styles
* fix flow
Co-authored-by: Jeremy Kauffman <jeremy@lbry.io>
Co-authored-by: Sean Yesmunt <sean@lbry.io>
