win: improve docs and category of jump lists #146

- Add more documentation and improve existing documetation.
- Rename 'Clear most recently used (MRU) lists' to 'Clear recent
  activity logs' for simplicity.
- Move 'clearing recent activity logs' outside of 'Clear
  third-application data' to directy under 'Privacy cleanup' as these
  recent activities are not always necessarily from third-party
  applications.
- Fix dead link.

Co-authored-by: NerdyGamerB0i <85419060+NerdyGamerB0i@users.noreply.github.com>