hotplug: allow button timeout actions to trigger a subsequent timeout #10
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This allows visual feedback when timeouts are reached.
In our case, there is a single button which on a normal press/release will initiate DPP, but longer presses will first reboot then factory reset. So users know they've held it down long enough, it's nice to change a status LED.
This also fixes what seems to me a bug, in that you can attach a timeout to a 'release' action but the timing was reset (so you can't distinguish between a released timeout vs a pressed timeout).