Steps to reproduce:

We have some issues with the dropdown menu after the last Zabbix upgrade (6.0 to 7.0). Not all menu segments are visible, the most important part we can not scroll down.
In the  message below, I will try to describe the problem precisely. 

We choose a host and click on it, waiting for the dropdown menu to appear. The menu has a few levels where segments follow each other and you can freely choose the one. But after the upgrade, we can not see the full menu, it seems like the some segments are restricted or framed by the screen resolutions and you can not scroll down.

Result: