- more work done on project management (new/save/load) system:
* added experimental dummy "browser connector" for localstorage
* added experimental method to fetch list of projects from connectors : these get fetch in an async way and then displayed on the projectBrowser,
seperated by storage type (each storage/connector type has its own list of projects etc)
* added an "isLogginRequired" flag to the connectors, so only the connectors which require a login are displayed in the "login" stub in the main menu
* cleanup and small improvements in the projectBrowserView
* started adding seperate "project libraries" to the various connectors (not functionnal yet)