Fixes for first public preview

❗ The software is in an early stage

• Older savegames may not work or show unexpected behaviour.
• Anno Designer does not allow to open multiple instances. After you opened it, close it before making any modifications in the savegame visualizer. Otherwise the software may hang or fail to update the preview.
• Some buildings are missing in the final layout (e.g. NW trade unions, some harbour buildings and many scenario related buildings)
• The reserved harbour space of dockland modules points into the wrong direction