add option to enable/disable Virtualization for columns/rows

[totraev]

Sometimes users might need disable Virtualization for columns or rows. By adding 2 new values (columns and rows) for enableVirtualization prop we can now control this behaviour.

1. if typeof enableVirtualization === boolean - Virtualization is enabled/disabled for columns and rows
2. if enableVirtualization === columns - Virtualization works only for columns
3. if enableVirtualization === rows - Virtualization works only for rows