Revert close-and-cleanup keyboard shortcut change, as it conflicts on

macs.

packages/mainmenu-extension/schema/plugin.json

@@ -34,7 +34,7 @@
     },
     {
       "command": "filemenu:close-and-cleanup",
-      "keys": ["Accel Shift Q"],
+      "keys": ["Ctrl Shift Q"],
       "selector": ".jp-Activity"
     },
     {

packages/mainmenu-extension/src/index.ts

@@ -298,7 +298,7 @@ export function createFileMenu(
   const commands = menu.menu.commands;
 
   // Add a delegator command for closing and cleaning up an activity.
-  // This one is a bit difference, in that we consider it enabled
+  // This one is a bit different, in that we consider it enabled
   // even if it cannot find a delegate for the activity.
   // In that case, we instead call the application `close` command.
   commands.addCommand(CommandIDs.closeAndCleanup, {