- Use the main display grid control to display deleted books
- Added search functionality for deleted books. This required creating a temporary search index in the `InProgress` folder. The products grid control now uses an instance of `ISearchEngine` to filter its grid entries. The main grid uses a singleton instance of `MainSearchEngine`, which merely wraps `SearchEngineCommands.Search()`. The TrashBinDialogs use `TempSearchEngine`.
- Users can now batch select `Everyting` as well as `Audible Plus Books`
Avalonia:
- Refactor main grid context menus to no longer require reflection
Use existing BaseUtil.LoadImage delegate, obviating need for derrived classes to load images
Since GridEntry types are no longer generic, interfaces are unnecessary and deleted.
