Remove default Alt+S shortcut for showing the app
Remove default Alt+S shortcut for showing the app

Verified that the Alt+S shortcut isn't installed on new installs, but I
suspect that it won't fix the situation for users who have already
installed older builds, and have the Alt+S shortcut in place.

FREEBIE

nrizzio/Signal-Desktop,nrizzio/Signal-Desktop,nrizzio/Signal-Desktop,nrizzio/Signal-Desktop