interfaces: add dbusmenu, freedesktop and kde notifications to unity7 (Closes #1573188)

[jdstrand]

No description provided.

[kyrofa]

My test case is the Qt systray example snap. This PR makes the indicator and notifications show up-- awesome job! However, the indicator has a menu with options to maximize, minimize, or quit the daemon, and selecting any of those options doesn't do anything-- you get this instead (where I clicked "quit"):

May 13 12:54:24 xenial dbus[1823]: apparmor="DENIED" operation="dbus_method_call"  bus="session" path="/MenuBar" interface="com.canonical.dbusmenu" member="AboutToShowGroup" name=":1.20" mask="receive" pid=3386 label="snap.systray.systray" peer_pid=1966 peer_label="unconfined"
May 13 12:54:26 xenial dbus[1823]: apparmor="DENIED" operation="dbus_method_call"  bus="session" path="/MenuBar" interface="com.canonical.dbusmenu" member="EventGroup" name=":1.20" mask="receive" pid=3386 label="snap.systray.systray" peer_pid=1966 peer_label="unconfined"

Is that something that should be handled here?

[jdstrand]

@kyrofa oh I missed the indicator. I can confirm and I'll add an additional access to this commit.

[3v1n0]

I think you also want GetCapabilities here. Clients might use that to behave differently (especially as unity notifications don't support "actions", while they have things such as "append")

[jdstrand]

Thanks @3v1n0 , added.

[kyrofa]

With the latest commit this works perfectly for my test-case 👍 .

[zyga]

This looks good, thank you

[mvo5]

👍 Thanks a lot @jdstrand