Add ability to use selected cell as input for button press

[SamuelSVD]

For example, if we have a pivot table of IDs, we can select ID 2 or ID 3 instead of only one per row.

In the below, if I select ID 3, it would allow me to run a query using ID 3 as the input because it is selected in the current cell.

Grouping	ID1	ID2	ID3
My IDs	1	2	3 [selected]
Other IDs	4	5	6