Make NET_ACTIVE messages always treated as from the user. Loosen up focus stealing...

Make NET_ACTIVE messages always treated as from the user.  Loosen up focus stealing for user-requested focusing.

Seems panels such as xfce's and gnome's still treat their activation requests
  as being from an application when a user has requested it.

Make the focus stealing code more lenient for user-requested focusings
  (_NET_ACTIVE).  But treat new windows as not user-requested unless they
  gave a launch time.

When activating a window, if another window would be the one to actually get
  focused, then activate that instead (avoid clicking a window in the panel and
  nothing happens).