Annoying upgrade popups

Those popups at the bottom left of screen that appear telling you that you have traps available to upgrade are just damn annoying. 

I currently have 24 traps available for upgrade, which are just waiting on skulls. If you cancel the popup, another appears in 5 seconds time. 

This means I have to spend 2 minutes clicking on annoying popups just to clear them all. Is there a setting where I can turn this off?
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