Save tree state 'per tree'

- Separate save state for Part and Stock tree

InvenTree/part/models.py

@@ -57,7 +57,8 @@ class PartCategory(InvenTreeTree):
         (including children of child categories)
         """
 
-        return len(Part.objects.filter(category__in=self.getUniqueChildren()))
+        return len(Part.objects.filter(category__in=self.getUniqueChildren(),
+                                       active=True))
 
     @property
     def has_parts(self):

InvenTree/part/templates/part/part_app_base.html

@@ -34,7 +34,11 @@ InvenTree | Part List
 {% block js_ready %}
 {{ block.super }}
     loadTree("{% url 'api-part-tree' %}",
-             "#part-tree");
+            "#part-tree",
+            {
+                name: 'part',
+            }
+    );
 
     $("#toggle-part-tree").click(function() {
         toggleSideNav("#sidenav");