Calling kded in a blocking way should be fine, but if we don't do
anything with the result, why wait?
Also avoids an introspection call.
CCBUG: 359611
REVIEW: 127475
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Branched from the monolithic repo kde-workspace, frameworks branch, at commit
049113e719dd2fc4446d054fa1a3aada330094f0
Friedrich W. H. Kossebau
David Edmundson
Montel Laurent
Aleix Pol