✨ Add popover with validation message for validation errors

public/locales/en/layout/modals/add-app.json

@@ -61,5 +61,8 @@
 			"save": "Save secret",
 			"update": "Update secret"
 		}
+	},
+	"validation": {
+		"popover": "Your form contains invalid data. Hence, it can't be saved. Please resolve all issues and click this button again to save your changes"
 	}
 }