Advanced Portfolio: Don't print footnotes if the account that needs them isn't included.

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23722 57a11ea4-9604-0410-9ed3-97b8803252fd
Advanced Portfolio: Don't leak prices.

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23723 57a11ea4-9604-0410-9ed3-97b8803252fd