I have finished all the levels, and am grinding quests now.

This is very slow, annoying, and repetitive.

To reduce clicking, is it possible to add an Auto-Update option to towers?

Once every few seconds or so each built tower should be checked, and any that have the option enabled and which I have money for should be upgraded (order doesn't matter) - this will give me some flexibility in changing settings or updating towers manually and won't add too much processing overhead.

This is pretty much what I have to do by hand now, and automating it away will make the process much less annoying.

(All the towers I build are generally different types, so the Update All long-press option doesn't help me)