Steps to reproduce:
1. Create a new "Universal 2D" project
2. Open Windows -> 2D -> Tile Palette
3. Click the "Create New Tile Palette" dropdown button and select the first entry
4. Click the button "Create"
5. Select any Folder in the OS window and click "Select Folder"
6. Select any sprite and drag it to the area with the label: "Drag Tile, Sprite or Texture (Sprite type) asset/s here."
7. Cancel/Close the OS pop-up window.
8. Observe that the drag area changed, and label "Drag Tile, Sprite or Texture (Sprite type) asset/s here." disappeared.

Actual results: Label "Drag Tile, Sprite or Texture (Sprite type) asset/s here." is missing, and the texture drag area switches to a state that should appear only when the texture asset is saved successfully (and is missing the actual texture).

Expected results: When the saving of the sprite asset is canceled drag area should go back to the default state with the label "Drag Tile, Sprite or Texture (Sprite type) asset/s here."

Reproducible with versions: 6000.0.66f1, 6000.3.5f1, 6000.4.0b5, 6000.5.0a5

Tested on (OS):  Windows, MacOS