In TL2, you can collapse lanes individually when using Grouped By. See attached.
The only way I can see to do something similar in TL3 is to open the Stacked Groups options, click through the selection, and deselect the item. This is clearly not the same behaviour, very clicky-clicky, and gets old very quickly.
Is it possible to collapse lanes individually in TL3?
If not, can we have them back?