add tab about translate

src/lang/cs.rs

@@ -39,6 +39,9 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Change ID", "Změnit identifikátor"),
         ("Website", "Webové stránky"),
         ("About", "O aplikaci"),
+        ("About RustDesk", ""),
+        ("Slogan_tip", ""),
+        ("Privacy Statement", ""),
         ("Mute", "Ztlumit"),
         ("Audio Input", "Vstup zvuku"),
         ("Enhancements", ""),