Following voluntary employee furloughs and salary cuts in the U.K., Monzo is continuing to take tough decisions in order to shore up its financial position amidst the coronavirus crisis and resulting economic downturn. The latest move — which TechCrunch understands was being considered prior to the pandemic, though undoubtedly the decision was escalated and made because of it — will see the U.K. challenger bank shutter its customer support office in Las Vegas. The U.S. outpost employs 165 customer support staff, who will now lose their jobs, and provided overnight…