Add exit function to the main interface for Desktop

v2rayN/ServiceLib/Resx/ResUI.Designer.cs

@@ -870,6 +870,15 @@ namespace ServiceLib.Resx {
             }
         }
         
+        /// <summary>
+        ///   查找类似 Are you sure to exit? 的本地化字符串。
+        /// </summary>
+        public static string menuExitTips {
+            get {
+                return ResourceManager.GetString("menuExitTips", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   查找类似 Export selected server for complete configuration 的本地化字符串。
         /// </summary>

v2rayN/ServiceLib/Resx/ResUI.resx

@@ -1363,4 +1363,7 @@
   <data name="TbSettingsCurrentFontFamilyLinuxTip" xml:space="preserve">
     <value>Install the font to the system and restart the settings</value>
   </data>
+  <data name="menuExitTips" xml:space="preserve">
+    <value>Are you sure to exit?</value>
+  </data>
 </root>

v2rayN/ServiceLib/Resx/ResUI.zh-Hans.resx

@@ -1360,4 +1360,7 @@
   <data name="TbSettingsCurrentFontFamilyLinuxTip" xml:space="preserve">
     <value>安装字体到系统中，重启设置</value>
   </data>
+  <data name="menuExitTips" xml:space="preserve">
+    <value>是否确定退出？</value>
+  </data>
 </root>

v2rayN/ServiceLib/Resx/ResUI.zh-Hant.resx

@@ -1240,4 +1240,7 @@
   <data name="TbSettingsCurrentFontFamilyLinuxTip" xml:space="preserve">
     <value>安裝字體到系統中，重新啟動設定</value>
   </data>
+  <data name="menuExitTips" xml:space="preserve">
+    <value>是否確定退出？</value>
+  </data>
 </root>