correctly delete window gocui views

Signed-off-by: Jeff Carr <jcarr@wit.com>

plugin.go

@@ -105,6 +105,18 @@ func action(a widget.Action) {
 	log.Log(INFO, "action() END")
 }
 
+func (w *guiWidget) deleteGocuiViews() {
+	if w.v == nil {
+		// no gocui view to delete for this widget
+	} else {
+		me.baseGui.DeleteView(w.cuiName)
+		w.v = nil
+	}
+	for _, child := range w.children {
+		child.deleteGocuiViews()
+	}
+}
+
 func (w *guiWidget) deleteNode() {
 	p := w.parent
 	for i, child := range p.children {
@@ -118,6 +130,7 @@ func (w *guiWidget) deleteNode() {
 	for i, child := range p.children {
 		log.Log(NOW, "parent now has child:", i, child.cuiName, child.String())
 	}
+	w.deleteGocuiViews()
 }
 
 func (w *guiWidget) AddText(text string) {