BehaviorSet Library with Behavior Set Parts

With the new CMake environment, a new CMake Flag CANDERA_DEPRECATED_WIDGETSET_ENABLED is available (Default setting is ON). When this flag is turned OFF, then instead of a single file "WidgetSet.cpp", several files are generated for every Widget or Behavior library.

This might resolve known issues with too many symbols generated during compilation of single "WidgetSet.cpp" file.