added filtersEnabled by group slug method

src/lib/filtering/filter.service.ts

@@ -99,6 +99,26 @@ export class FilterService {
         );
     }
 
+    filtersEnabled(filterGroupSlug: string): boolean {
+        let enabled = false;
+        const group = this.getGroup(filterGroupSlug);
+
+        group?.filters.forEach(filter => {
+            if (filter.checked) {
+                enabled = true;
+                return;
+            }
+            filter.children.forEach(f => {
+                if (f.checked) {
+                    enabled = true;
+                    return;
+                }
+            });
+        });
+
+        return enabled;
+    }
+
     reset(): void {
         this.filterGroups.forEach(group => {
             group.filters.forEach(filter => {