Require comment on priority change (#2212)

* script.js

* README.md

Author: Indra-kolge

Client-Side Components/Client Scripts/Require comment onPriority change/README.md

@@ -0,0 +1,6 @@
+Table: sn_customerservice_case
+Type: OnChange
+Field: Priority
+
+Use Case:
+Make additional comments mandatory on priority change for the case table.

Client-Side Components/Client Scripts/Require comment onPriority change/script.js

@@ -0,0 +1,10 @@
+function onChange(control, oldValue, newValue, isLoading, isTemplate) {
+    if (isLoading || newValue === '') {
+        return;
+    }
+    if ((!g_form.isNewRecord()) && (newValue != oldValue)) {
+        g_form.setMandatory('comments', true);
+        g_form.addErrorMessage('Additional comment required when changing Priority.');
+    } else {
+        g_form.setMandatory('comments', false);
+    }