Allow to show window over dbus

[neochapay]

No description provided.

[jmlich]

I don't see use case for this feature so I would prefer not to merge it. Additionally, I the generic bus naming will bring some confusion when 3rd party app comes.

[neochapay]

The most important use case for this feature is background application services.
For example: the weather is updated in hidden mode and is always available, it also reports about approaching rain and so on...
The generic tire name will be for glacial applications only.
And we use this functionality in dialer settings and message application

[jmlich]

I see. I am still not convinced if this is a right way. I mean I would expect background tasks processed by some daemon and UI started only when needed. But I am not sure about changes needed to reach that state. You can merge it if you think that this is the right way. I have somehow narrow view and trying to make things working.