nl_tokens: _addRowTR : Helper to add row directly with <tr >
pl_tokens: <mask> ( rx , tr ) { // Empty if ( this . rowCount === 0 ) this . $el . oj ( tr ) // Last else if ( rx === this . rowCount ) this . $tr ( rx - 1 ) . ojAfter ( tr ) // Not last else this . $tr ( rx ) . ojBefore ( tr ) this . bodyChanged ( ) }