Guides view actions do not account for adding models to existing VDB

1) Followed Model JDBC Source action set

• resulted in VDB with source model in it
  2) Followed *Model Flat File Source" action set
• re-used project
  3) Wanted to add Flat File source to VDB in Step 1) and the action set didn't account for that need.

Maybe the Create VDB wizard could use a "Edit" button that brings up the Create VDB wizard in EDIT mode and allow users to "Add" models to VDB (not remove or sync)