[CAL-857] Sidebar shouldn't scroll when we have the top banner

[ciaranha]

https://user-images.githubusercontent.com/8019099/213945384-ca4f3f9f-d57b-4013-8a12-cbd38456cd17.mp4

_{From SyncLinear.com | CAL-857}

[Hanaffi]

@PeerRich can you assign me this? or find me some other issue :) ?

[PeerRich]

sure! assigned

[PeerRich]

@G3root unassigned you fyi

[PeerRich]

I wonder if the top banner should just be positioned as fixed and overlay the rest

[ciaranha]

Almost certain this was working perfectly 2 weeks ago.