Rewrite words and groups into result

src/data_provider/card_sets.rs

@@ -24,10 +24,7 @@ pub fn load_sets(connection: &Connection) -> Result<Vec<DeckSettings>, Notificat
         .map_err(|_| DbLoadError)?;
 
     let mut buffer = Vec::with_capacity(16);
-    for word in iter.filter_map(|result| result.ok()) {
-        buffer.push(word);
-    }
-
+    iter.filter_map(|res| res.ok()).for_each(|i| buffer.push(i));
     Ok(buffer)
 }