windows/mac tray tooltip show controlled session count

* ubuntu 22.04 can't see tooltip

Signed-off-by: 21pages <pages21@163.com>

src/lang/template.rs

@@ -544,5 +544,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Installation Successful!", ""),
         ("Installation failed!", ""),
         ("Reverse mouse wheel", ""),
+        ("{} sessions", ""),
     ].iter().cloned().collect();
 }