Use the title of the confluence space as the title of the space home page

When importing a space from Confluence, the title of the space is not kept during the import and has to be copied manually. This is an issue if there are a lot of spaces to import, as it adds a new step at each import.

One of the reasons of not having this space title is because we don't create a home page for the imported spaces to my knowledge. We could add the option in the filter to create a dummy home page by default, so that we can set its title.