Bug: Table add-row button hides horizontal scroll

[ebads67]

The add-row button covers the table horizontal scroll, makes it hard to scroll using a mouse.

Lexical version:

Steps To Reproduce

1. Create a table with many columns so that the horizontal scroll appears
2. Try to use the horizontal scroll using the mouse
3. The add-row button appears when the mouse nears the bottom of the table and hides the horizontal scroll.