Replace float/UInt64 durations by a more precise Time class (#388)

Improve Clock class with atomic RestartIfOver method and allows to choose required precision

src/Nazara/VulkanRenderer/VulkanRenderWindow.cpp

@@ -277,8 +277,6 @@ namespace Nz
 			return false;
 		}
 
-		m_clock.Restart();
-
 		return true;
 	}