If it annoys you, perhaps you shouldn't have turned it on (sorry couldn't help myself)
This 'Show detailed info on performed action' is off by default, so you may have been tweaking the settings without checking their effect.
Click on the avast icon and select Web Shield, Customize.., Advanced, switch of 'Show detailed info on performed action' you will need to do this for each provider that you use if you have enabled this function in it.