Brought back 'smooth view'. Took some hours to untangle it all, code was spread all over, instead of localized in 1 call. Tsk! Still not perfect, but at least more in control. For the hackers; check void smooth_view() in view3d_view.c, here all 3d view stuff should be handled, so it can optionally use animating. For the users: 'smooth view' now plays at a maximum of 30 hz, and doesn't block anymore. So even slow animated views remain responsive if you press many numpad keys.