probe_eddy_current: Add support for probing in "scan" mode

When probing in "scan" mode, the toolhead will pause at each position,
but does not descend.  This can notably reduce the total probing time.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

klippy/extras/probe.py

@@ -438,7 +438,7 @@ class ProbePointsHelper:
         def_move_z = self.default_horizontal_move_z
         self.horizontal_move_z = gcmd.get_float('HORIZONTAL_MOVE_Z',
                                                 def_move_z)
-        if probe is None or method != 'automatic':
+        if probe is None or method == 'manual':
             # Manual probe
             self.lift_speed = self.speed
             self.probe_offsets = (0., 0., 0.)