Tidy Layout on Control+W only

Cmd+W closes the window on macOS, so the Command half of the pair is left
alone; this is the one shortcut that is not bound on both modifiers.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

main.py

@@ -1174,7 +1174,6 @@ SHORTCUTS = [
     ("z", do_undo),
     ("y", do_redo),
     ("b", toggle_left_column),
-    ("w", do_tidy_layout),
 ]
 for key, handler in SHORTCUTS:
     window.bind_all(f"<Command-{key}>", handler)
@@ -1188,6 +1187,10 @@ window.bind_all("<Control-Shift-Z>", do_redo)
 window.bind_all("<Delete>", delete_selected_component)
 window.bind_all("<BackSpace>", delete_selected_component)
 
+# Tidy Layout is the one shortcut bound on Control alone: Cmd+W closes the window on
+# macOS, and shadowing that would be a poor trade for a second way to re-flow a sheet.
+window.bind_all("<Control-w>", do_tidy_layout)
+
 # Sheet history: the browser chords, in both the Alt and the mac bracket spelling.
 window.bind_all("<Alt-Left>", go_back)
 window.bind_all("<Alt-Right>", go_forward)
@@ -1230,9 +1233,7 @@ menu_view.add_command(
     label=MENU_FORWARD_LABEL, command=go_forward, accelerator="Alt+Right", state="disabled"
 )
 menu_view.add_separator()
-menu_view.add_command(
-    label="Tidy Layout", command=do_tidy_layout, accelerator=f"{accel_mod}+W"
-)
+menu_view.add_command(label="Tidy Layout", command=do_tidy_layout, accelerator="Ctrl+W")
 menu_bar.add_cascade(label="View", menu=menu_view)
 
 menu_kits = tk.Menu(menu_bar, tearoff=0)