The keyboard cannot be used to scroll within pages until a mouse click is done within the page (outside the menu). This affects most pages, exceptions include Configuration/Host groups and Configuration/Actions, as well as several pages in Administration.

Having to click somewhere on the page is also prone to annoying mistakes because a large part of the page content usually is active, i.e. clicking there for the purpose of enabling keyboard scrolling changes the page again.

When using a large monitor, keyboard scrolling is very convenient because it removes the need to carefully aim the mouse pointer at the scroll bar.

Steps to reproduce:

1. Navigate to Monitoring/Hosts.
2. Press the Page Down key.

Result:
Nothing happens.

Expected:
The page scrolls down.