Summary

This pull request addresses the issue described in #1 where icons in the spritesheet that are used for multiple entries would not update correctly when a single icon is updated, leading to it being overwritten with the old image.

Related Issues

Fixes #1 (but without generating a new Atlas file).

Details

• Ensures that if a user replaces a sprite that is a duplicate, it will be placed on the spritesheet last to prevent overwriting the image.
• Adds functionality to track the names of sprites that use images referred to by multiple sprites.
• Adds functionality to track which sprites have been updated by the user through image hashing including non-dupes.

Edge Cases

• If an icon used under multiple sprite names is changed twice in different places, the one changed last (in the order listed in the UI) will take precedence. This means the later image overwrites the first one, which is noticeable if using images of different sizes.
• Further improvements may require generating a new Atlas file and spritesheet that separates icons with duplicate sprite names into individual icons.

Demo

With the implemented changes, if a sprite such as monster_type_0_en.png is replaced with a substitute, the spritesheet should be updated as shown below (top left).