pre 4.0.0_b18

clone Device process:
-you select the number of Device you want to add
-you select the start channel
-you select the start dimmer
-you select if there's a gap between each device's dimmer range

now:
if there's a device that ever exists in the range of (start channel + number of device), it will be deleted
if there's a device patched in the rage of (dimmer start + number of device's frame), the device will be unpatched but won't be deleted.

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