Detaching the global-quick-tap functionality from the quick-tap term.
This makes way for two improvements:
1. This functionality can be added to combos under a unified name
'global-quick-tap-ms'.
2. This allows users to set a lower term for the 'global-quick-tap'
(typically ~100ms), and a higher term for the regular
quick-tap (typically ~200ms)
This deprecates the global-quick-tap option, however if it is set, the
quick-tap-ms value will be copied to global-quick-tap-ms.
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