Rename and clear bad code

src/main.rs

@@ -23,7 +23,7 @@ use crate::data_provider::card_sets::load_sets;
 use crate::data_provider::settings::get_setting;
 use crate::data_provider::sqlite::default_connection;
 use crate::data_provider::words::{load_word_groups, load_words};
-use crate::lang::{CardSetSettings, WordData, WordGroup};
+use crate::lang::{DeckSettings, WordData, WordGroup};
 use crate::navigation::{AppSettings, RootMessage, ScreenState};
 use crate::quiz::*;
 use chrono::NaiveDate;
@@ -81,7 +81,7 @@ fn subscription(_state: &ScreenState) -> Subscription<RootMessage> {
 
 pub struct AppState {
     pub dictionary: Vec<WordData>,
-    pub card_sets: Vec<CardSetSettings>,
+    pub card_sets: Vec<DeckSettings>,
     pub word_groups: Vec<WordGroup>,
     pub connection: Connection,
     pub sync_data: AppSettings,