dragging from below 2nd grid and grow upper grid too much #1558

Your environment

• 3.1.3 H5 version
• chrome windows

Steps to reproduce

https://jsfiddle.net/adumesny/63c7e4ps/
came from #1210

Expected behavior

when you drag an item from grid2 below into one above, grid1 should grow just enough to contain new item

Actual behavior

seems to grow repeatedly and insert at least 3 rows (seen worse)