P: Add option for lossy compression when exporting DNG

Feature request for Lightroom on iPad: when exporting a DNG, add an option to enable lossy compression.

Why this is valuable to me: To save storage space and bandwidth, I like to store photos that aren't critically important as compressed DNG files so I can still have some of the editing flexibility of raw without the large file size. In trying to create an iPad-only workflow, this is the final thing hanging me up because I can't find a way to convert files to compressed DNG without going through a computer.