bug: mda widget broken on latest pymmcore-widgets

[ianhi]

The following lines are now out of date and throwing errors as the corresponding objects no longer exist in pymmcore-widgets

napari-micromanager/src/napari_micromanager/_gui_objects/_mda_widget.py

Lines 34 to 44 in 433cb9e

	self.channel_groupbox.setMinimumHeight(230)
	self.checkBox_split_channels = QCheckBox(text="Split Channels")
	self.checkBox_split_channels.toggled.connect(self._toggle_split_channel)
	g_layout = cast(QGridLayout, self.channel_groupbox.layout())
	g_layout.addWidget(self.checkBox_split_channels, 1, 0)
	# TODO: stage_pos_groupbox should have a valueChanged signal
	# and that should be connected to _toggle_checkbox_save_pos
	self._save_groupbox.toggled.connect(self._toggle_checkbox_save_pos)
	self.position_groupbox.valueChanged.connect(self._toggle_checkbox_save_pos)
	self.channel_groupbox.valueChanged.connect(self._toggle_split_channel)

n.b. you need to be running pymmcore-plus/pymmcore-widgets#159 in order to get far enough to run into these errors.

[tlambert03]

fixed with #269