fix: do not clear promotion/transfer details if doc is amended (#32000)

erpnext/hr/employee_property_update.js

@@ -9,7 +9,7 @@ frappe.ui.form.on(cur_frm.doctype, {
 		});
 	},
 	onload: function(frm) {
-		if(frm.doc.__islocal){
+		if (frm.doc.__islocal && !frm.doc.amended_from) {
 			if (frm.doctype == "Employee Promotion") {
 				frm.doc.promotion_details = [];
 			} else if (frm.doctype == "Employee Transfer") {
@@ -123,6 +123,8 @@ var add_to_details = function(frm, d, table) {
 			new: data.new
 		});
 		frm.refresh_field(table);
+		frm.fields_dict[table].grid.wrapper.find(".grid-add-row").hide();
+
 		d.fields_dict.field_html.$wrapper.html("");
 		d.set_value("property", "");
 		d.set_value('current', "");