Show number of tamed mounts under Profile/Stats & Achievements

@snicker issued #1936 which changed `line 65` from `{{petCount}}` to `{{profile.petCount}}`. I don't know if that's the way it should be and if the problem is somewhere else but I switched it back as it wasn't displaying the correct number of pets. Also, on `stables.jade` both pets and mounts are `{{petCount}}` and `{{mountCount}}`.

And `inventoryCtrl.js` makes it display the amount of mounts tamed now but I don't know if that's correct.