Implement a generic API endpoint for enumeration of status codes (#4543)

* Implement a generic API endpoint for enumeration of status codes

* Adds endpoint for PurchaseOrderStatus

* Add more endpoints (sales order / return orer)

* Add endpoints for StockStatus and StockTrackingCode

* Support build status

* Use the attribute name as the dict key

* Refactored status codes in javascript

- Now accessible by "name" (instead of integer key)
- Will make javascript code much more readable

* Bump API version

InvenTree/templates/status_codes.html

@@ -1,11 +1,15 @@
+{% load report %}
+
 /*
  * Status codes for the {{ label }} model.
+ * Generated from the values specified in "status_codes.py"
  */
 const {{ label }}Codes = {
-    {% for opt in options %}'{{ opt.key }}': {
-        key: '{{ opt.key }}',
-        value: '{{ opt.value }}',{% if opt.color %}
-        label: 'bg-{{ opt.color }}',{% endif %}
+    {% for entry in data %}
+    '{{ entry.name }}': {
+        key: {{ entry.key }},
+        value: '{{ entry.label }}',{% if entry.color %}
+        label: 'bg-{{ entry.color }}',{% endif %}
     },
     {% endfor %}
 };
@@ -13,33 +17,7 @@ const {{ label }}Codes = {
 /*
  * Render the status for a {{ label }} object.
  * Uses the values specified in "status_codes.py"
- * This function is generated by the "status_codes.html" template
  */
 function {{ label }}StatusDisplay(key, options={}) {
-
-    key = String(key);
-
-    var value = null;
-    var label = null;
-
-    if (key in {{ label }}Codes) {
-        value = {{ label }}Codes[key].value;
-        label = {{ label }}Codes[key].label;
-    }
-
-    // Fallback option for label
-    label = label || 'bg-dark';
-
-    if (value == null || value.length == 0) {
-        value = key;
-        label = '';
-    }
-
-    var classes = `badge rounded-pill ${label}`;
-
-    if (options.classes) {
-        classes += ' ' + options.classes;
-    }
-
-    return `<span class='${classes}'>${value}</span>`;
+    return renderStatusLabel(key, {{ label }}Codes, options);
 }