Mobile Security for Android -- Call Blocker has no "From Call Log" button

Avast Mobile Security Avast Mobile Security for Android
1

Version 6.16.4, for Android Lollipop 5.1.1
LG Rebel model L44VL (Verizon LTE through Straight Talk)

No way of blocking unwanted calls that have already come in.
Two from a single number in the last hour.

2

Hi, see: https://help.avast.com/en/ws_android/1/gpdpc_guidelines.html