fix: ignore empty/None scripts (#19111) (#19113)

(cherry picked from commit 39faf34)

Co-authored-by: Ankush Menat <ankush@frappe.io>

frappe/desk/form/meta.py

@@ -156,14 +156,17 @@ def add_custom_script(self):
 		list_script = ""
 		form_script = ""
 		for script in client_scripts:
+			if not script.script:
+				continue
+
 			if script.view == "List":
 				list_script += f"""
 // {script.name}
 {script.script}
 
 """
 
-			if script.view == "Form":
+			elif script.view == "Form":
 				form_script += f"""
 // {script.name}
 {script.script}