Is it possible (or does a mod exist) to prioritize military unit moves first when at war, and ranged units over melee? Often I'm halfway through attacking a city when the game interrupts me to choose production half a continent away or adopt a policy.
Well, the only reason your getting interupted in the middle of your moves for the adopt a policy and choose production is that you starting moving before it had finished displayed all of the notices.
You can set queues to avoid being prompted for city production.
Which unit it chooses is outside of your control but you can cycle.
As to mods, you'd have to ask the folks over at the Mod Creation forum.