Chore: hide dashboard in OSX 10.10 due to unable set useragent

ClashX/AppDelegate.swift

@@ -70,7 +70,8 @@ class AppDelegate: NSObject, NSApplicationDelegate {
         setupData()
         actionUpdateConfig(self)
         updateLoggingLevel()
-
+        hideFunctionIfNeed()
+        
         // check config vaild via api
         ConfigFileManager.checkFinalRuleAndShowAlert()
         
@@ -174,6 +175,14 @@ class AppDelegate: NSObject, NSApplicationDelegate {
         
   
     }
+    
+    func hideFunctionIfNeed() {
+        if #available(OSX 10.11, *) {
+            // pass
+        } else {
+            dashboardMenuItem.isHidden = true
+        }
+    }