Extend `cloneBlock` function to use like `cloneRow` but without table

I  have extend `cloneBlock` function, i have add another parameter `$incrementVariables` default TRUE;

This parameter can transform the `cloneBlock` function in alternative to `cloneRow` function working without table;

I extend this because i have need to use the `cloneRow` but in regular text not using table and `cloneRow` not allow this.