Can't change cover type in Extended Tags window

[abelcheung]

Since 3.17, newly imported cover image can't have its type modified in Extended Tags window under some condition.

Steps to reproduce:

1. Begin with track that contains no cover image. (I used FLAC for testing, no sure if it's the same for other encodings)
2. Open Extended Tags window, import one or more images as cover images
3. Try to change cover type; it should be impossible by now. All images were set as Front Cover and won't budge.

The regression seems to only occur for 3.17 in Extended Tags window; it doesn't happen if any condition below is true:

• mp3tag <= 3.16
• 3.17+ if user is editing cover images in Tag Panel instead
• if some cover image is already present before editing

[LyricsLover]

I can confirm that the choice of cover type will not be saved using the Extended Tags window and adding a first cover.

In the Tag Panel it works as expected.
It also works, if you open the Extended Tags window a second time after saving the cover and then change the cover type.

[Florian]

This is now fixed with Mp3tag v3.18b. Thank you for reporting the issue.