Save new group settings in the database

src/controllers/groups_controller.rs

@@ -102,7 +102,7 @@ pub fn set_settings(r: &mut HttpRequestHandler) -> RequestResult {
         url: r.post_url_opt("url", false)?,
     };
 
-    println!("New settings: {:#?}", new_settings);
+    groups_helper::set_settings(&new_settings)?;
 
-    r.success("complete implementation")
+    r.success("Group settings have been successfully updated!")
 }