This update adds error visualization in the edit-as-image mode for the map
editor, along with tiles and actor assets analysis features to help build more
compact and organized assets. The map's edit-as-image mode now saves image data
to the project file, allowing editing to resume later. This release also
improves editor usability and fixes known issues.

v1.8.1

* Editor
  * Added visualization for errors in map asset's edit-as-image mode
  * Added tile reference analysis report to the tiles editor
  * Added tile duplicate analysis report to the tiles editor
  * Added actor frame reference analysis report to the actor editor
  * Added image serialization when editing a map as image
  * Updated the map editor to enable local palette when enabling edit-as-image for the first time
  * Updated the map editor to use palette bits if applicable to create image when enabling the edit-as-image mode
  * Improved map editing under the edit-as-image mode
  * Improved palette calculation for map editing under the edit-as-image mode
  * Improved tiles overflow handling when editing a map as image
  * Fixed a local palette filling bug when importing a map from an image