I implemented this feature in v1.3.6
I could have messed up something, so please check all the modes:
deconstruction planner signal:
-4 = Deconstruct area with provided item signals as whitelist
-5 = Deconstruct area with provided item signals as blacklist
-6 = Cancel area deconstruct with provided item signals as whitelist
-7 = Cancel area deconstruct with provided item signals as blacklist
Signal "T">0 - trees
Signal "R">0 - rocks
Signal "C">0 - cliffs
Item signals (filter) also shuld be >0