Don't session-restore invalid paths
When session restore is populating the main window, it's unconditional; you'll get whatever was there before. This can be a problem if any of those things are now missing. For example, maybe you were browsing files on a removable disk, then quit Dolphin, and finally removed the disk. The next time you launch Dolphin again, it will try to show you the view from the now-missing removable disk.
To prevent this, we now look at all the URLs in all of the view containers that were created after session-restore has finished doing its thing; if any of them are invalid local URLs, we change the URL to the home folder instead to avoid showing the user a view with an invalit location in it.
BUG: 427619 FIXED-IN: 20.12