Use is_valid for Id

src/main.rs

@@ -27,6 +27,7 @@ use crate::lang::{DeckSettings, Id, WordData, WordGroup};
 use crate::navigation::{AppSettings, RootMessage, ScreenState};
 use crate::quiz::*;
 use chrono::NaiveDate;
+use hashbrown::HashMap;
 use iced::{Font, window};
 use iced::{Subscription, Theme, keyboard};
 use iced_core::Size;
@@ -34,7 +35,6 @@ use iced_core::window::Position;
 use iced_core::window::settings::PlatformSpecific;
 use mimalloc::MiMalloc;
 use rusqlite::Connection;
-use hashbrown::HashMap;
 
 #[global_allocator]
 static GLOBAL: MiMalloc = MiMalloc;