SupplierPart availability (#3148)

* Adds new fields to the SupplierPart model:

- available
- availability_updated

* Allow availability_updated field to be blank

* Revert "Remove stat context variables"

This reverts commit 0989c308d0.

* Increment API version

* Adds availability information to the SupplierPart API serializer

- If the 'available' field is updated, the current date is added to the availability_updated field

* Add 'available' field to SupplierPart table

* More JS refactoring

* Add unit testing for specifying availability via the API

* Display availability data on the SupplierPart detail page

* Add ability to set 'available' quantity from the SupplierPart detail page

* Revert "Revert "Remove stat context variables""

This reverts commit 3f98037f79.

InvenTree/templates/js/translated/build.js

@@ -795,7 +795,7 @@ function sumAllocationsForBomRow(bom_row, allocations) {
         quantity += allocation.quantity;
     });
 
-    return parseFloat(quantity).toFixed(15);
+    return formatDecimal(quantity, 10);
 }
 
 
@@ -1490,8 +1490,7 @@ function loadBuildOutputAllocationTable(buildInfo, output, options={}) {
 
         // Store the required quantity in the row data
         // Prevent weird rounding issues
-        row.required = parseFloat(quantity.toFixed(15));
-
+        row.required = formatDecimal(quantity, 15);
         return row.required;
     }
 
@@ -2043,7 +2042,7 @@ function allocateStockToBuild(build_id, part_id, bom_items, options={}) {
         }
 
         // Ensure the quantity sent to the form field is correctly formatted
-        remaining = parseFloat(remaining.toFixed(15));
+        remaining = formatDecimal(remaining, 15);
 
         // We only care about entries which are not yet fully allocated
         if (remaining > 0) {