How to move the "Local Folder" to the top at the account treeview pane?

i tried the Addon “Manually sort folders” but with this Addon you only can move the pop3 email acccounts but not the “Local Folder” account…any ideas how to move the “Local Folder” account?

info: i have 25 pop email accounts and for a better email overview i use filters to move/merge all incoming emails to the “Local Folder” account.