[trunk] Linked parts are not closed when the main score is closed
Tested with trunk rev. 3475 under Windows XP, Qt SDK 2010.04 (Qt lib 4.7.0)
1) Open an (existing) score with parts (excerpts) defined: a tab is created for the score with sub-tabs for the parts.
2) Close the score.
Result: the parts are still displayed.
Expected result: the parts are also closed.