Hit key F10 and then you will have option to refresh highlight
I was going to come here and point out the "Refresh All" menu item, but actually it's "Refresh All Extracts" which is pretty much the opposite of what you want. What you're looking for is this, correct me if I'm wrong: Refresh all live connections to pick up new data, but don't refresh any extracts.
The simplest way to do that might be just to close the workbook and re-open it. But yes, with nothing selected in your dashboard, F10 (stop Auto Update Dashboard) and then F9 (Update Dashboard) will do that "global F5". Those keybindings map to two buttons in the middle of the toolbar.