[INTERNAL] MDC.FieldBase: Only reset filterValues, when current _vLiveChangeValue is known.
[INTERNAL] MDC.FieldBase: Only reset filterValues, when current _vLiveChangeValue is known.

Change-Id: I1713e554866a96366d5c28a1679162b0c08dd3fa

SAP/openui5,SAP/openui5,SAP/openui5,SAP/openui5