Rewrite history page

src/pages/repetition.rs

@@ -167,7 +167,7 @@ impl RepetitionState {
     }
 
     fn increment_counter(&mut self) {
-        let mut state = self.state.lock();
+        let mut state = self.state;
         let id = self.settings.id;
         let activity = state.activity.get_mut(&id);