feat: show the UOM alongside the quantity in the supplier selection dialog

The quantity is meaningless without the unit it is counted in, which the buyer
had to look up on the Material Request itself.

(cherry picked from commit d0cae2eb9c)

erpnext/stock/doctype/material_request/material_request.js

@@ -494,7 +494,16 @@ frappe.ui.form.on("Material Request", {
 							label: __("Quantity"),
 							reqd: 1,
 							in_list_view: 1,
-							columns: 2,
+							columns: 1,
+						},
+						{
+							fieldtype: "Link",
+							fieldname: "uom",
+							options: "UOM",
+							label: __("UOM"),
+							read_only: 1,
+							in_list_view: 1,
+							columns: 1,
 						},
 						{
 							fieldtype: "Link",