Fix ndisplay button

Author: jeylau

src/napari_deeplabcut/_widgets.py

@@ -394,7 +394,6 @@ def __init__(self, napari_viewer):
         self.viewer.window._qt_viewer.viewerButtons.gridViewButton.hide()
         self.viewer.window._qt_viewer.viewerButtons.rollDimsButton.hide()
         self.viewer.window._qt_viewer.viewerButtons.transposeDimsButton.hide()
-        self.viewer.window._qt_viewer.viewerButtons.ndisplayButton.setDisabled(True)
 
         if self.settings.value("first_launch", True) and not os.environ.get(
             "hide_tutorial", False
@@ -605,9 +604,6 @@ def on_insert(self, event):
             paths = layer.metadata.get("paths")
             if paths is None:  # Then it's a video file
                 self.video_widget.setVisible(True)
-                self.viewer.window._qt_viewer.viewerButtons.ndisplayButton.setDisabled(
-                    False
-                )
             # Store the metadata and pass them on to the other layers
             self._images_meta.update(
                 {
@@ -732,9 +728,6 @@ def on_remove(self, event):
             paths = layer.metadata.get("paths")
             if paths is None:
                 self.video_widget.setVisible(False)
-                self.viewer.window._qt_viewer.viewerButtons.ndisplayButton.setDisabled(
-                    True
-                )
         elif isinstance(layer, Tracks):
             self._trail_cb.setChecked(False)
             self._trails = None