(discussed on Teams at length, but filing to make sure we're tracking)

Regressed in #10666.

Repro settings:

{ "keys": "win+`", "command": { "action": "globalSummon", "monitor": "any" } }
{ "keys": "ctrl+shift+`", "command": { "action": "quakeMode" } }

The win+` one will fail to override the win+sc(43) one in the defaults. When it gets time to RegisterHotkey, the one from the defaults will claim the hotkey first.

WIP over at dev/migrie/b/broken-globalsummon-overloading.

Also related to #10729. That might be the ultimate solution here, but if we can't get that for 1.11 then we'll need another workaround, or back out the sc() one.