Hover effect on rows only when needed (#426)

Add hover effect to the row only when onRowClick or onRowDoubleClick are specified.

https://material-table-core.com/demos/sort/basic

src/components/MTableBodyRow/index.js

@@ -449,7 +449,7 @@ export default function MTableBodyRow(props) {
           }
           handleOnRowClick(event);
         }}
-        hover={onRowClick !== null || onRowDoubleClick !== null}
+        hover={onRowClick || onRowDoubleClick}
         style={getStyle(props.index, props.level)}
       >
         {renderColumns}