Print composer template creates identically named composer items

[jctull]

If you create a composer item, save it to a template, then load the template again, the composer item name is identical and you compromise access to the two identically named composer items from the "Print Composers" menu item. The new composer item should get an index number appended or some other method of producing a new composer item uniquely named relative to the already existing one.

Currently, you will see and have access to only one of the composer items under the "Print Composers" submenu. You have to go to the "Composer Manager" to be able to access each composer item. You can rename from there to work around the issue manually.

[mhugent]

The problem was that, after the template read, the instance has been unregistered from the composers submenu, but not inserted again. Also, I think the composer title should not be changed when reading from template file.

r12612 fixes both issues.