logic: flag FilterUndefinedNodesFromGraph in ApplicationSettings

If set to true the flag filters all undefined nodes from the graph, unless every active node is undefined.

bin/app/data/ApplicationSettings_template.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 
+<!-- BOOL: 0, 1 -->
 <!-- INTEGER: int e.g 123 -->
 <!-- DECIMAL: float e.g 123.456 -->
 <!-- STRING: string e.g hello -->
@@ -8,6 +9,8 @@
 <config>
 	<StartupProject><!-- STRING: path to project settings xml file --></StartupProject>
 
+	<FilterUndefinedNodesFromGraph><!-- BOOL: filter out undefined nodes in graph --></FilterUndefinedNodesFromGraph>
+
 	<source>
 		<CompilerFlags>
 			<CompilerFlag><!-- STRING: compiler flag, including the dash e.g. -v --></CompilerFlag>