Zooming in browser makes menu items disappear (Logout, Administer, etc)

When zooming in Chrome and Firefox, the navigation menu along the top also gets bigger and menu items to the right disappear. There's no scroll bar that lets you access them, and they don't wrap.

Especially problematic in training when zooming is crucial so participants can read items on the screen. Then you must zoom in and out alternately to access the Administer menu and let participants view screen.