Fix: `macro index o` overlapping with next account

When the transition is made from an offline profile to an online
profile, there is still someone else's macro - side effects...
Variables, macros, and so on must be taken-into-account
**symmetrically** with any of the `mutt-wizard`'s profiles.

bin/mw

@@ -122,6 +122,7 @@ bind index,pager g noop
 bind index,pager M noop
 bind index,pager C noop
 bind index gg first-entry
+unmacro index o
 unmailboxes *
 "
 fi