Addition of toggle buttons to configure primary display settings
When a primary display is set, you can click on information icon button
but when its menu pops open, you then have to click the 'configure...' button of each to set these items to appear on the primary display. Instead the buttons should be changed to toggles to set the respective options in the panel, desktop, and notification settings.
Desktop Settings > Icons tab > check 'Show icons on primary display'
Notification Settings > General tab > switch 'Show notifications on' to 'primary display'
Panel Settings > Display tab > switch 'Output' to 'Primary'