Graph: pan with left or right, open with the other

Client/Settings.py

@@ -122,11 +122,10 @@ def ShowSettingsDialog(TheApp: App, OnSaved: Callable[[bool], None], StartCatego
                                        value=Config.GraphShowDirectories)
     PanButtonPicker = ft.RadioGroup(
         ft.Column([
-            ft.Radio(value="Left", label="Left"),
-            ft.Radio(value="Middle", label="Middle (click to grab, move, click again to let go)"),
-            ft.Radio(value="Right", label="Right"),
+            ft.Radio(value="Right", label="Right (left-click opens a dot)"),
+            ft.Radio(value="Left", label="Left (right-click opens a dot)"),
         ], spacing=0),
-        value=Config.GraphPanButton,
+        value="Left" if Config.GraphPanButton == "Left" else "Right",
     )
 
     # Connection.
@@ -224,8 +223,7 @@ def ShowSettingsDialog(TheApp: App, OnSaved: Callable[[bool], None], StartCatego
             ft.Divider(height=1, color=Palette.Surface1),
             ft.Text("Pan with mouse button"),
             PanButtonPicker,
-            _Note("Scroll zooms. Flet can't follow a held middle button, so Middle works like "
-                  "middle-click autoscroll."),
+            _Note("Scroll zooms. The other button opens the dot you click."),
         ], spacing=12, scroll=ft.ScrollMode.AUTO),
         "Connection": ft.Column([
             _Note("Browse a directory on this computer, or connect to a SaraView server."),