Code review comment for lp:~bilalakhtar/unity/software-center-integration-for-o

I am taking the branch for a test spin - and one problem I've discovered so far is that if S-C hangs (because apt is broken typically) then you'll be perpetually stuck with a launcher icon with an empty progress bar on it.

I am not sure what to do in these situations. I guess the right thing is to simply have some sort of timeout. If there haven't been progress in 20s then silently remove the launcher icon. There are probably better ways though..?