[Katsunami]

Hi

There may be a bug in the ToC Editor. I have noticed this before, but it is still present in version 2.51, at least on Windows 10, 64-bit.

Let's say, I have book with a ToC like so:

Part 1
Chapter 1
Chapter 2
Chapter 3
Part 2
Chapter 4
Chapter 5
Chapter 6

I would like it to become:

Part 1
--Chapter 1
--Chapter 2
--Chapter 3
Part 2
--Chapter 4
--Chapter 5
--Chapter 6

So, I select Chapter 1-3 and then try to drag-and-drop them onto Part 1.

However, it is not allowed. I cannot drop the chapters 1-3 on Part 1, as the cursor displays a pointer with a "not allowed" symbol beside it. I first have to drag-and-hold the Chapter 1-3 selection outside of the list if chapters; for example, touch the titlebar, or touch the area with the buttons on the right. Then, when moving back to the list and hovering over Part 1, I'm allowed to drop the chapters.

I can reproduce this behavior with any book, on two different computers, Calibre 2.49 - 2.51, but both are running Windows 10 x64. I'm sorry to say I have no computer with Windows 8.1 or earlier available anymore so I cannot test on older Windows versions.