First off, I think it should be in the Lubuntu packageset, but it isn't.
Second off, you actually did it via the git-ubuntu workflow (whether you knew it or not) rather than just using the Bazaar branch.
The earliest I'll be able to sponsor this is probably very much too close for comfort for the release team. Please talk to them and get some clearance beforehand; if you can't justify it being in before the release, prepare the bug report for a 0-day SRU and we can go that route.
ACK. Please talk to the SRU team (cc me on the ping, probably to rbasak and bdmurray) to let them know your intentions. Communication is paramount.
Alternatively, talk to infinity and vorlon, who might have an opinion either way. Both are also on the SRU team.
Just to put it down on paper, we're going the SRU route but they're not into supporting a 0 day. It's been broken for a long time and no one's really noticed or cared. Riddell disabled it from the Kubuntu seed at the end of 2014 and it's never returned so that's why Kubuntu never noticed, either.
The version is not suitable for an SRU. You would likely need something like 0.3.5.1 if this was the only release that had 0.3.5. Please figure out a creative version scheme that is suitable for all stable releases.