Tabs from other windows cannot be dropped when there are no existing tabs in the window

[shawmanz32na]

Edit by @rsese to add repro steps from #141 (comment)

I'm actually able to reproduce this issue with Atom v1.34.0 on OSX 10.14.2. Steps to reproduce are:

1. Open two empty atom windows side-by-side
2. Open a file in window A
3. Attempt to drag tab from window A to window B
4. Open a different file in window B
5. Attempt to drag tab from window A to window B

The expected result is for step 3 to be successful, but it fails.

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I often use atom across two screens by having two windows open, each with a few tabs.

Sometimes these tabs need to get moved between windows, which can currently be done by dragging-and-dropping a tab into the other window

However, if all tabs get removed from a window, it is not possible to drag a tab back over to that window. This can be seen by the missing blue bar in the following picture.

My workaround has been to close the tabless window, reopen a new window using ctrl-shift-n, (which opens a blank 'Untitled' tab), drag over a tab from the other window, and then close the blank tab. However, this is a pain.

[izuzak]

Strange indeed .. I was able to reproduce this on Ubuntu, but not on Windows or OSX.

[shawmanz32na]

Just for the sake of version info, since I didn't put it in the issue description, I'm running Windows 8.1, and just reproduced using atom version 0.201.0.

[connorbrinton]

I'm actually able to reproduce this issue with Atom v1.34.0 on OSX 10.14.2. Steps to reproduce are:

1. Open two empty atom windows side-by-side
2. Open a file in window A
3. Attempt to drag tab from window A to window B
4. Open a different file in window B
5. Attempt to drag tab from window A to window B

The expected result is for step 3 to be successful, but it fails.