Migrate to parking_lot

src/repetition.rs

@@ -13,7 +13,8 @@ use iced::widget::{Column, button, column, container, row, rule, space, text, to
 use iced::{Element, Fill, Task, Theme, alignment, keyboard};
 use rodio::MixerDeviceSink;
 use std::collections::HashSet;
-use std::sync::{Arc, Mutex};
+use std::sync::Arc;
+use parking_lot::Mutex;
 use tokio::task::spawn_blocking;
 
 pub struct RepetitionState {
@@ -148,7 +149,7 @@ impl RepetitionState {
     }
 
     fn increment_counter(&mut self) {
-        let mut state = self.state.lock().unwrap();
+        let mut state = self.state.lock();
         let id = self.settings.id;
         let activity = state.activity.get_mut(&id);