#6 Move the VACUUM menu

[Moonwink]

Move the VACUUM menu from table level action to
database level action. Currently, when you right click
on a table name, it displays a pop-up menu that
contains the Vacuum command. This should be moved to
the File menu.

The VACUUM command cleans the main database by copying
its contents to a temporary database file and reloading
the original database file from the copy. This
eliminates free pages, aligns table data to be
contiguous, and otherwise cleans up the database file
structure.