Refactored to require handlers to specify the components they rely on and to specify when they are ready. This fixes a lot of bugs with the UI when users try to press buttons while the application is still loading.

src/handlers/radarr_handlers/indexers/edit_indexer_settings_handler.rs

@@ -42,6 +42,10 @@ impl<'a, 'b> KeyEventHandler<'a, 'b, ActiveRadarrBlock> for IndexerSettingsHandl
     self.key
   }
 
+  fn is_ready(&self) -> bool {
+    !self.app.is_loading && self.app.data.radarr_data.indexer_settings.is_some()
+  }
+
   fn handle_scroll_up(&mut self) {
     let indexer_settings = self.app.data.radarr_data.indexer_settings.as_mut().unwrap();
     match self.active_radarr_block {