-
Despite the debounce logic introduced in 60621b90, GSD kept warning me of the battery level every time my Logitech K600 keyboard (via Unifying receiver) disconnects/reconnects. Added another condition: when battery level drops to `UP_DEVICE_LEVEL_NONE`, the previous entry in the hash table would not be overwritten. This avoids duplicated warnings when transitioning NONE->LOW->NONE->LOW.
39c9fd0f