Revert "fix header-cell dropdowns (for example from filter/select)" (#458)

This reverts commit 12b7ae0.

Author: jacekkolasa

src/components/tableV2/core/base-table.js

@@ -121,6 +121,7 @@ Table.HeadCell = forwardRef(
           fontSize: "14px",
         }}
         position="relative"
+        overflow="hidden"
         padding={[1, 2]}
         width={`${width}px`}
         onMouseEnter={() => onHover({ row: null, column: id })}