fix for using the selectable component in two places
Merge branch 'master' of https://github.com/stevebuik/GraphVizForce

# By Zhiren Guan
# Via Zhiren Guan
* 'master' of https://github.com/stevebuik/GraphVizForce:
  Added test coverage to page controller tab1
  Fixed ERDPersister bug to get settings without version number, adaptable with v1 groups or v3 groupToObjectsToFieldsMap