[Bug 847976] Use locale for question progress.

The question listing progress bar did not consider any filters, specifically locale filters. Considering the level of separation between different locales in the questions app, this isn't good.

This change is to consider only the current locale when calculating the percentage the progress bar should be filled.

Due to MySQL being lame, I haven't been able to run tests on this. I'm working on fixing it, but for now I am hoping that Leeroy will validate my code.

r?