policycheck_state: set_visibility: make param entity non-required

Signed-off-by: Ralf Zerres <ralf.zerres@networkx.de>

advotracker/src/callbacks/policycheck_state.rs

@@ -236,7 +236,7 @@ impl PolicyCheckState {
     }
 
     // Update count of elements in the policy data list.
-    fn update_data_count(&self, ctx: &mut Context<'_>) {
+    fn _update_data_count(&self, ctx: &mut Context<'_>) {
         // old api syntax
         let data_list_count = ctx.widget().get::<PolicyDataList>(PROP_POLICY_DATA_LIST).len();
         ctx.widget().set(PROP_POLICY_DATA_COUNT, data_list_count);