I have oftentimes found myself having a whole menu expanded in its entirety after searching for something. That is very annoying, to be honest. I would suggest a right-click collapse all and right-click expand all so we do not have to go through the entire list clicking arrows every time we search for something. This expand all thing makes things way worse when it comes to finding things.
Edit: Right-click hide all, right-click solo selection. Since it also unhid everything. This is beyond a weird clunky mess.