Fixed bug caused by commit f8fc9ec498 related to Issue #53.

**selection** is the index of the congregation
  list. **all_congregations** is all the rows for the Congregation table
  in a tuple in the same order as displayed in the list. The correct way
  to pass the row id is **all_congregations[selection][0]**.
Merge pull request #54 from TheoDevelopers/fix-bug-with-line143

Fixed bug caused by commit f8fc9ec498 related to Issue #53.