[fixed] Can't drag a texture from the Outliner window to the AutoUV window.

[tkbd]

This issue on the AutoUV window.
When editing the UVs of an object with multiple materials, you need to switch each texture to adjust the position of UVs.
Even if drag and drop a texture to AutoUV window the background is white(no change).
It was possible for v 2.0.5 and v 1.5.4.

OSX 10.11.6
Wings3D 2.1.4.1

Here is test file

  mtex.wings (Size: 6.96 KB / Downloads: 0)

The Cube1 object has two materials:
Default_checkerboard : texture is checkerboard
Default_vbars : tesxture is vbars

For example, I want edit UVchart with vbars as texture preview.
1. Select Cube1
2. Open AutoUV window
3. Current AutoUV windows's background is ABCD texuture
4. So for switch texture preview, Drag to vbars(Outliner item) drop AutoUV window
5. AutoUV background no change.

Is this correct in this way?