Copy&Paste on a table cell, creates new table row

[roxgirdu]

Are you reporting a feature request or a bug?

Bug:
When a table cell is copied and pasted into another table cell, a new table row is created and the copied cell is pasted on the next row.

Provide detailed reproduction steps (if any)

1. Add a table
2. Copy a table cell.
3. Paste it into another cell.

Expected result

Another table row is created and the cell is pasted on the next line.

Actual result

The copied cell should be pasted within the cell where it wanted to be copied.

Other details

• Browser: Firefox, Chrome, IE 11
• OS: macOS 10.12.6, windows 8.1
• CKEditor version: 4.7.2, 4.7.3
  Demo: https://cl.ly/110w2V3l2G3b

[msamsel]

I was able to reproduce this situation.