BIG-94: handle estimate converted to invoice.

src/containers/Alerts/Estimates/EstimateDeleteAlert.js

@@ -46,7 +46,24 @@ function EstimateDeleteAlert({
         });
         closeDrawer('estimate-detail-drawer');
       })
-      .catch(({ errors }) => {})
+      .catch(
+        ({
+          response: {
+            data: { errors },
+          },
+        }) => {
+          if (
+            errors.find((e) => e.type === 'SALE_ESTIMATE_CONVERTED_TO_INVOICE')
+          ) {
+            AppToaster.show({
+              intent: Intent.DANGER,
+              message: intl.get(
+                'estimate.delete.error.estimate_converted_to_invoice',
+              ),
+            });
+          }
+        },
+      )
       .finally(() => {
         closeAlert(name);
       });