Not happening.
This was requested before and is non-trivial to implement, as its non-trivial to find out if and how many science packs are in a lab's reach, or if they are locked away in some chest or on another planet or on a belt that leads nowhere, ...
Just because there are all science packs in a logistic network, does not mean they are all loaded into at least one lab.
If labs could be loaded with logistic bots we could discuss this, but until then it would be a too big performance penalty.
Factorio 2.1 has support for labs setting science based on circuit conditions and that seems to work pretty fine, if done correctly.
Also you can grab my other mod that disables the spoilage of gleba science packs.