Updated make files/scripts to accomodate execution/building in windows in addition to linux/mac (#4135)

webapp/Makefile

@@ -37,10 +37,14 @@ run-fullmap: .npminstall
 stop:
 	@echo Stopping changes watching
 
+ifeq ($(OS),Windows_NT)
+	wmic process where "Caption='node.exe' and CommandLine like '%webpack%'" call terminate
+else
 	@for PROCID in $$(ps -ef | grep "[n]ode.*[w]ebpack" | awk '{ print $$2 }'); do \
 		echo stopping webpack watch $$PROCID; \
 		kill $$PROCID; \
 	done
+endif
 
 clean:
 	@echo Cleaning Webapp