Restructure root folder

[ButteryCrumpet]

• Users can see all notes among all folders from Storage name nav
• Delete the current root folder (All Notes) Root folder no longer exists, cannot be created.
• Create a default folder called "Default" automatically when storage is created
• Migrate notes in "All Notes" to "Default"
• Hide new note button other than UI that users choose the folder
• New note on right-click on the folder
• Users can not create note if there is no folder
• Fixed bug where synced notes would not update their storageId