- Added auxiliary windows for the history and the external board
- Gave a title to auxiliary windows and remember their position (more or less) and size
- Auxiliary windows do not survive anymore after the main one
- Preferences are now stored in a sensible place
- Ensure unicity of players names (in the interface only, not the core)
- Update the main window title with the game type
- Display the player name in the history
- The history widget is now able not to align the rack and the corresponding word
- The dictionary path is remembered in the preferences
- Ask for confirmation when loading a dictionary in the middle of a game
- Preview tiles are coloured differently, and joker characters are in lowercase