ZFP - Support Absolute Position (Bed Position) synchronization

ZFP supports Relative Number and Relative Position synchronization but not support Absolute Position (Bed Position) synchronization.

The customer wants to support it on ZFP, same as Universal Viewer.

• When click sync button, Absolute Position (Bed Position) sync is enabled by default.

• If the user viewing comparison series, Relative Position sync is enabled instead Absolute Position (Bed Position) sync.