BlueDevil systray icon

[Alex Fiestas]

Since we're trying to reduce the clutteness in our systray for 4.8, I'd like 
to expose how we're handling it in BlueDevil so you can give me feedback :p

====== Short term ======
There are two ways of turning off Bluetooth, by hardware and by software.

By hardware: When turned off by hardware the bluetooth-monolithic application 
is killed since there is no use for it, ergo the systray icon is gone

By software: If the user turn it off by software, probably means that he will 
want to turn in on by software again, so in that case we're keeping the 
systray.

====== Long term ======
In BlueDevil 3.0, I'm thinking on not executing bluedevil-monolithic by 
default, this is why:

bluedevil-monolithic is used mainly for: 
Sending files
	The place to send files is the file management, not a systray icon. We 
already provide a nice context menu integration and I'm sure that the "Share 
stuff" in KDE is going to grow, so the user will be able to send files from 
more places.

Pairing devices
	This is something that is done once per device, and I don't think the 
average user has this many devices. Apart from the Bluetotoh KCM, I plan to 
integrate Bluetooth in other KCM's such mouse, keyboard or printing by adding 
buttons like "Add bluetotoh mouse", "Add bluetooth keyboard" etc...

Turning bluetooth off/on 
	This mainly makes sense when you're in battery mode, so maybe we can show 
the option somewhere else.

Enable discoverability
	As device pairing, you usually have to turn on the visibily a few times, 
once for example a device is sent to you, the sender will remember your laptop 
so no discoverability is needed.

As you can see, there isn't a strong reason why we should keep the systray in 
the future, but for now and until we do the needed work I think we should keep 
it as it is (short term).

Any feedback?