Update pseudopos set_current_position to also update notepad signal

[ZLLentz]

Current Behavior

In pseudopositioner:

pcdsdevices/pcdsdevices/pseudopos.py

Lines 209 to 230 in e3d6e45

	def _update_position(self):
	"""Update the pseudo position based on that of the real positioners."""
	position = super()._update_position()
	if self._my_move:
	self._update_notepad_ioc(position, 'notepad_readback')
	return position
	def set_current_position(self, position):
	"""
	Adjust all offsets so that the pseudo position matches the input.
	This will raise an AttributeError if any of the real motors is missing
	a ``set_current_position`` method.
	Parameters
	----------
	position : PseudoPos
	The position
	"""
	real_pos = self.forward(position)
	for motor, pos in zip(self._real, real_pos):
	motor.set_current_position(pos)

The notepad readback gets out of sync for the same reason explained in #1409

Expected Behavior

When we set_current_position, the notepad readback should be updated