Add ability to filter stock by "in_stock" (#376)

assets/release_notes.md

@@ -1,3 +1,8 @@
+### - 
+---
+
+- Improved filters for stock list
+
 ### 0.12.2 - June 2023
 ---
 
@@ -7,6 +12,7 @@
 - Bug fix for scrolling long lists
 
 ### 0.12.1 - May 2023
+---
 
 - Fixes bug in purchase order form
 

lib/inventree/stock.dart

@@ -186,7 +186,6 @@ class InvenTreeStockItem extends InvenTreeModel {
       "part_detail": "true",
       "location_detail": "true",
       "supplier_detail": "true",
-      "in_stock": "true",
     };
   }
 

lib/widget/part_list.dart

@@ -91,6 +91,7 @@ class _PaginatedPartListState extends PaginatedSearchState<PaginatedPartList> {
     "active": {
       "label": L10().filterActive,
       "help_text": L10().filterActiveDetail,
+      "tristate": true,
     },
     "assembly": {
       "label": L10().filterAssembly,

lib/widget/stock_list.dart

@@ -80,6 +80,12 @@ class _PaginatedStockItemListState extends PaginatedSearchState<PaginatedStockIt
 
   @override
   Map<String, Map<String, dynamic>> get filterOptions => {
+    "in_stock": {
+      "default": true,
+      "label": L10().filterInStock,
+      "help_text": L10().filterInStockDetail,
+      "tristate": true,
+    },
     "cascade": {
       "default": false,
       "label": L10().includeSublocations,