Code review comment for lp:~gary-lasker/software-center/unity-launcher-integration-fixes

Thanks for your work on this branch.

The code looks good, I like the fact that we have a fake PURCHASE_TRANSACTION_ID now
in enums for example.

One minor nitpick would be that I liked that we had a seperate function in 5.0 _register_unity_launcher_transaction_started() for on_transaction_started(). But
given how small it is now its probably not needed.

During manual testing I noticed a delay for up to 20s between the finish of the install and the fly-in animation. This needs to be investigated before this can be merged.
I reproduced this delay on both my quantal box and on precise (to ensure that its not a quantal artifact).