Bug 555182 - Security Type template hidden

Part 2: Change commodities in namespace "template" to namespace "User"
unless the mnemonic is also "template". This makes commidities which
have been entered into "template" by mistake visible so that they
can be deleted or edited.

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23699 57a11ea4-9604-0410-9ed3-97b8803252fd