fix: restart I/O when mvbox_move setting is changed

When the setting is enabled,
new IMAP loop should be started.

src/config.rs

@@ -475,7 +475,10 @@ impl Config {
 
     /// Whether the config option needs an IO scheduler restart to take effect.
     pub(crate) fn needs_io_restart(&self) -> bool {
-        matches!(self, Config::OnlyFetchMvbox | Config::SentboxWatch)
+        matches!(
+            self,
+            Config::MvboxMove | Config::OnlyFetchMvbox | Config::SentboxWatch
+        )
     }
 }