Revert "User now can decide to shutdown regardless PVR state (YesNoDialog). Refactored."

This reverts commit 2bcf2a26ebf3fd853efaf13aa8a7f1539e0bb210.
Revert "Feature: Inhibit shutdown if PVR is not idle. Can be switched on/off via PVR energy saving settings."

This reverts commit 8d88a75f8405f6c988968ea9632fba30b87f98d5.