blueman applet: cannot rename adapter

[lxg]

When trying to rename the adapter, I get the following error message:

    Traceback (most recent call last):
      File "/usr/bin/blueman-adapters", line 76, in on_dialog_response
        adapter.SetProperty('Name', settings['name'])
    AttributeError: 'Adapter' object has no attribute 'SetProperty'

Steps to reproduce:

- start `blueman-applet` from command line
- open *Devices …* window
- go to `Adapter → Preferences`
- enter a different name into the input box
- click `close` (doesn’t work)
- close the dialog through the window control (works)
- see above error in command line

Environment: Blueman-applet 1.99.alpha1 on Xubuntu 15.04