Auto adjustable grids on resizing

[shweta-tiwari1991]

I have added an option to collapse and expand grid items, when I expand It automatically pushes grid item to up, for this I have used :
@ViewChild(GridsterComponent) gridster!: GridsterComponent;

in my collapse method:
this.gridster.optionsChanged()
with this, I am able to move items up, but on expanding the grid item it doesn't pushes items to down.
I have set compactType as 'compactUp&Left'.