DDP-6918: Fix Autocomplete list scrolling [Pancan] #878
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The previous fix PR#869 causes to another non caught bug.
We put autocomplete scroll under app header by scrolling. However other components (e.g. language selector) uses the same overlay container and also appear under the header.
See screenshots: (currently on dev, after the previous fix)


It is quite tough (if possible?) to tweak it by css. And it is a known Angular materials issue.
So it should be done in another way.
The simplest one is just closing any autocomplete suggestions list like it was done firstly (0171b33).
On the other hand it's not a user friendly behavior.
Thus I have fixed it a bit tricky, but it is working.
See screenshots after the fix:

