Extra space is added in each cell for added table column

Steps to Reproduce

1. Create a new table in the editor
2. Add a new column for this table
3. Place your cursor in one of the cells of this column
4. Press BACKSPACE to delete

Expected Results

The backspace will not trigger anything

Actual Results

There is an extra space created when the column is appended. So when the backspace is pressed, it will delete the extra space

Environment Information

Using Internet Explorer 9