Should we have a Mobile section in Bugzilla, or at least a why-mobile tag?

[foxfirefey]

Pros for: helps turn mobile development into an easily sectionable project and focus, which is good, because mobile is an important thing since more and more computing is being done on mobile devices. Without a category, or at the very least a "why-mobile" tag, there's no easy way to pull up work that specifically relates to mobile initiatives.

Cons against: so many categories already, I know we're reluctant to add to that.

We might also want a "mobile" tag on dw_dev!

(This post inspired by somebody asking after mobile initiatives in dw_dev.)