## Issue
6236 Add context menu to file page
## Notes
The download button actually handles a lot of things -- generating 'streamingUrl', differences between Web and Desktop, download progress for Desktop, etc. A simpler fix would be to put something else (maybe "Share") into the overflow menu instead.
Anyway, went ahead to do it per 6236, but retained the item for Desktop since we need a progress label.
## Issue
The removal of `svg` from `media__subtitle` in 09b689ba made the icon black.
## Fix
Both 'Open File' and 'Download' should have the same css class.
* 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>
