fix: add doctype, idx, parent, parenttype & parentfield in new grid row

(cherry picked from commit 727d0a9acd32a6de5edf061de24582b85ec3b17f)

frontend/src/components/Controls/Grid.vue

@@ -417,6 +417,8 @@ const addRow = () => {
   newRow.name = getRandom(10)
   showRowList.value.push(false)
   newRow['__islocal'] = true
+  newRow['idx'] = rows.value.length + 1
+  newRow['doctype'] = props.doctype
   rows.value.push(newRow)
 }
 

frontend/src/data/script.js

@@ -162,6 +162,10 @@ export function getScript(doctype, view = 'Form') {
       return null
     }
 
+    row.parent = row.parent || data.name
+    row.parentype = row.parenttype || data.doctype
+    row.parentfield = row.parentfield || parentField
+
     return createDocProxy(row, instance)
   }