Hi
It would have been nice if the horizontal scrollbar would always be visible if needed.
With a long page like this with frozen first columns its inconvenient to first scroll to the bottom on the page to see the correct columns and then scroll to the top. If you understand.
In the image below I have pasted in a image of a scrollbar on the bottom of the grid. This is where I think it should be.
Here is where the scrollbar is now. You have to first scroll the page down to adjust the horizontal scrollbar. And then scroll back to the top of the page see the first rows in the grid.