Edit key press event for data grid

Hi all,   Currently I am using data grid(not grid2) to show list of values. I want to navigate up and down in this list from the key board up and down keys. I see that is working when you use space bar + key up or space bar +key down. not without space bar.   I also observed that its moving row by row when you press key up and down arrows without space. however the item where the cursor present is not getting highlighted. unable to find this css also in all the project files.    I am unable to find the file where I can see this key event script present which makes this space bar+key up to work. That way I can remove the space bar click so that key up/down will work.    Any one has any other idea to navigate through the list with key up and down.   Thanks and Regards, Nirmal Kumar
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