clear system states array on new graph

twmain/enviroment.js

@@ -581,8 +581,6 @@ function getNeighbors(sourceNids, relKey) {
 //    POSS: rewrite using .hidden instead of add/remove
 function changeLevel(optionalTgtState) {
 
-    console.log('got optionalTgtState', optionalTgtState)
-
     // show waiting cursor
     TW.gui.elHtml.classList.add('waiting');
 

twmain/methods.js

@@ -107,6 +107,9 @@ TW.resetGraph = function() {
   TW.gui.checkBox=false
   TW.gui.lastFilters = {}
 
+  // forget the states
+  TW.states = [TW.initialSystemState]
+
   // remaining global vars will be reset by new graph mainStartGraph
 }