org.freedesktop.PowerManagement.Inhibit should only prevent suspend

For preventing screen standby or screen locking the org.freedesktop.ScreenSaver.Inhibit must be used.
Both calls erroneously did the same.

CHANGELOG: org.freedesktop.PowerManagement.Inhibit will only inhibit suspending the machine now (as per spec), to prevent screen power management use org.freedesktop.ScreenSaver.Inhibit instead

Differential Revision: https://phabricator.kde.org/D11182

daemon/powerdevilfdoconnector.cpp

@@ -98,10 +98,10 @@ int FdoConnector::Inhibit(const QString &application, const QString &reason)
     // Inhibit here means we cannot interrupt the session.
     // If we've been called from DBus, use PolicyAgent's service watching system
     if (calledFromDBus()) {
-        return PolicyAgent::instance()->addInhibitionWithExplicitDBusService((uint)PolicyAgent::ChangeScreenSettings,
+        return PolicyAgent::instance()->addInhibitionWithExplicitDBusService((uint)PolicyAgent::InterruptSession,
                                                                              application, reason, message().service());
     } else {
-        return PolicyAgent::instance()->AddInhibition((uint)PolicyAgent::ChangeScreenSettings, application, reason);
+        return PolicyAgent::instance()->AddInhibition((uint)PolicyAgent::InterruptSession, application, reason);
     }
 }