Adds battery icons at 16, 22 and 32 px. Includes symlinks for symbolic icons and standard icon names for compatibility with 3rd parties. Adds `status/32` to `index.theme`. Includes symlinks for symbolic iconsChanges `status/22` and standard icon names for compatibility with 3rd parties`status/22@2x` from Scalable to Fixed. Requested by @hein for drone control app.