Sprite Source properties list don't respect texture address for states

[KallDrexx]

1. Create a sprite
2. Set the texture address to Entire Texture
3. Create a state category with 1 state
4. Select the created state
5. Change the texture address to Custom
   ---> Observe the Left, Top, Width, and Height properties do not show up in the editor. This is because the Source field is basing itself on the default state's texture address, not the currently selected state.

gumbug2.mp4

[vchelaru]

Fixed: 2da0ef9