- Add dark theme icon variants
- Change all light theme icon fill colors to match Chardonnay
Also fixed#1460 by chaing the directory select control to DirectoryOrCustomSelectControl
- Added `MockLibraryBook` which contains factories for easily creating mock LibraryBooks and Books
- Added mock Configuration
- New `IPersistentDictionary` interface
- New `MockPersistentDictionary` class which uses a `JObject` as its data store
- Added `public static Configuration CreateMockInstance()`
- This method returns a mock Configuration instance **and also sets the `Configuration.Instance` property**
- Throws an exception if not in debug
- Updated all chardonnay controls to use the mocks in design mode. Previously I was using my actual database and settings file, but that approach is fragile and is unfriendly towards anyone else trying to work on it.
- Theme changes do not require restart
- Fix some text appearing black in dark mode
- Fix dialog boxes not appearing correctly on Windows
- Fix queue vertical scroll bar overlapping items
