Fix remapping values bleeding from last entry, set input props same as the original device.

[shinyquagsire23]

I ran into a bug with this config,

devices:
- input_name: 'ELAN9038:00 04F3:261A Pen'
  output_name: remap-pen
  remappings:
    'BTN_TOOL_RUBBER': [
         {'code': 'BTN_TOOL_PEN', 'value': 0},
         {'code': 'BTN_TOOL_RUBBER'}
    ]

where the BTN_TOOL_PEN entry would set event.value to 0 and the following entry would not actually set BTN_TOOL_RUBBER to the original event value but would keep it 0. The intended effect was to always unset BTN_TOOL_PEN if BTN_TOOL_RUBBER is ever set or unset. I also fixed another issue where device properties wouldn't be set, which was needed since this device is a stylus pen for a touchscreen and it had INPUT_PROP_DIRECT set.

[philipl]

Thanks for doing this. Could I ask you to split it into two changes for clarity please?