Add functionality to allow a v2 Getting Started page and a v3 Getting Started page to be used
Currently in v3 the Getting Started page, which was created in v2, shows a message that it is recommended to reset the positions due to the fact it is importing a v2 into the v3 version. When doing this, the page no longer displays correct. To maintain compatibility with v2, it would be good to have a new storage location to be used in v3 for the Getting Started page. New pages for v3 can then be created and the old pages still will work when using the v2 version of MuseScore.