Wait For DC data to load before trying to scroll to bottom.

[Hiro-Nakamura]

I was having failures locally with the test runner trying to click on the scrollbar before any data was loaded in the grid.

So I added a check to make sure the linked DC data was loaded before we proceed on to the scroll to the bottom.

Release Notes

• [fix] wait for data to be in DC before moving on to clicking on the scroll bar