[plasma-workspace/Plasma/5.7] shell: don't try to load layout before kamd starts

[Ivan Čukić]

> It can also be simply not installed.
> That was the case for the Neon/Netrunner reports.

Yes, Bhushan covered that part - not starting or crashing. I just
specified the cases where kamd is 'expected' to crash.

>> One of the things that we could try is for kactivities to return
>> 'Unknown' as the state until it figures out whether there is kamd
>> running or not. And then set it as Running or NotRunning.
>
> +100

Ok. This will make Plasma's life a bit easier I guess. I still expect
corner-case problems, but there should be fewer of them.

Cheers,
Ivan