feat: Update go to row panel's row number with cursorRow (deephaven#1508

)

The row number in the go to row panel now updates when users click on a
row in the table. The value displayed when multiple selections or ranges
of rows are selected depends on the value of cursorRow.

Fixes a bug where selecting a row then using the context menu to open
the go to row panel would fill in the panel with the incorrect row
number.

Resolves deephaven#1406.