enables autoheight of the grid
| mode | boolean | true/false |
| maxHeight | number | maximum height before scrolling appears (no limit by default) |
| countFullHeight | boolean | control usage of maxHeight param:if true,all grid height included in max height calculation,if false(default)-only data part(no header)of the grid included in it |
//enable auto height mode
myTreeGrid.enableAutoHeight(true);
//disable auto height mode
myTreeGrid.enableAutoHeight(false);
//enable auto height mode, set maximum height before scrolling appears,
//only data part included in max height calculation
myTreeGrid.enableAutoHeight(true,100);
//enable auto height mode, set maximum height before scrolling appears,
//all grid height included in max height calculation
myTreeGrid.enableAutoHeight(true,100,true);