ChangeFolder: do not depend on the msgstore

We need to clear the filtering etc upon folder switch.
Not having a valid msgstore is however no reason not to switch directories.

commands/account/cf.go

@@ -34,22 +34,22 @@ func (_ ChangeFolder) Execute(aerc *widgets.Aerc, args []string) error {
 	if acct == nil {
 		return errors.New("No account selected")
 	}
-	store := acct.Store()
-	if store == nil {
-		return errors.New("Cannot perform action. Messages still loading")
-	}
 	previous := acct.Directories().Selected()
 	if args[1] == "-" {
 		if dir, ok := history[acct.Name()]; ok {
-			store.ApplyClear()
 			acct.Directories().Select(dir)
 		} else {
 			return errors.New("No previous folder to return to")
 		}
 	} else {
-		store.ApplyClear()
 		acct.Directories().Select(args[1])
 	}
 	history[acct.Name()] = previous
+
+	// reset store filtering if we switched folders
+	store := acct.Store()
+	if store != nil {
+		store.ApplyClear()
+	}
 	return nil
 }