The application menu is only installed on macOS (#77845) — everywhere
else it is set to null, which strips the role accelerators with it. A
menu-only Cmd+R meant Windows and Linux got no page reload at all.
Moves the claim into the same before-input-event hook Cmd+W already uses
for exactly this reason, and drops the accelerator from the menu item so
one keypress can't fire both paths on macOS.
Brooklyn Nicholson
4d1cdf83c9