Essentially the most basic GridComponent when ngIf'd in and out will not be collected -- apparently because of orientation change / resize change listeners not being appropriately removed.
Steps to Reproduce
Click the TOGGLE TABLE button to hide the table
Click the TOGGLE TABLE button to show the table
repeat several times
Take a memory snapshot
There will be HTMLTableRowElement items that grow each iteration of toggling the table.
The HTMLTableRowElements retention shows that they eventually lead to a resize listener, or an orientation change listener.