add reset method to CodeListView

src/app/debugger/debuggerUI/VmDebugger.js

@@ -75,9 +75,7 @@ function VmDebugger (_parentUI, _traceManager, _codeManager, _solidityProxy, _ca
 
   this.asmCode = new CodeListView()
   this.vmDebuggerLogic.event.register('codeManagerChanged', this.asmCode.changed.bind(this.asmCode))
-  this.vmDebuggerLogic.event.register('traceUnloaded', function () {
-    self.asmCode.changed([], '', -1)
-  })
+  this.vmDebuggerLogic.event.register('traceUnloaded', this.asmCode.reset.bind(this.asmCode))
 
   this.calldataPanel = new CalldataPanel()
   _parentUI.event.register('indexChanged', this, function (index) {

src/app/debugger/debuggerUI/vmDebugger/CodeListView.js

@@ -52,6 +52,10 @@ CodeListView.prototype.indexChanged = function (index) {
   this.codeView.scrollTop = this.itemSelected.offsetTop - parseInt(this.codeView.offsetTop)
 }
 
+CodeListView.prototype.reset = function () {
+  this.changed([], '', -1)
+}
+
 CodeListView.prototype.changed = function (code, address, index) {
   if (this.address === address) {
     return this.indexChanged(index)