Feature Request: Menu jumling to the first item

After changing form e.g. Menu SYSTEM to CONTENT, the content of the page does not change until the user clicks to submenu item, e.g. pages.
A user might get confused and/or getting annoyed about this. Usualy a the first menu item will be active in a submenu.

The “Recent ContentBox News” in the dashboard might be not the thing a regular editor/author wants to read. Please over the possibility to switch if off.