Is it possible to prevent the dialog boxes and instead have notices show up as text on chat box?
It's unnecessarily more difficult when one flies into an ion storm, a box pops up to notify of this and then another box for hostile bots present, but the ship cannot be controlled when the box pops up. It would be better to have these notices as text lines in the chat bar.

looks like NavComp plugin is the culprit.

Would anyone know how to tweak it to prevent these warnings?

Yes, use print('text text') instead of purchaseprint.