Allow Appointment Pop-up to disappear

I would like to reduce the number of clicks it takes to work with Cliniko. When the Appointment Pop-up appears, I click New Treatment (for example) into a new tab which leaves the pop-up remaining over the appointment book. I then have to click the pop-up ‘away’. Can the pop-up simply disappear once action is taken on it (ie the New Treatment button clicked)?
NB: I like to keep the appointment diary always open in a tab and work in other tabs.