修正close函数无法判断nib相关的窗口而引起的多窗口问题

V2rayU/Base.lproj/ConfigWindow.xib

@@ -71,6 +71,7 @@
                 <outlet property="vmessPort" destination="UVC-X3-LD3" id="2qh-18-ZrZ"/>
                 <outlet property="vmessSecurity" destination="Pj0-ZW-RX6" id="Uv5-eV-LQH"/>
                 <outlet property="vmessUserId" destination="fBB-vZ-Uij" id="ecR-Iy-tgA"/>
+                <outlet property="window" destination="QvC-M9-y7g" id="QkV-hM-UcI"/>
                 <outlet property="wsHost" destination="J2o-zN-FBt" id="gAT-ZQ-W96"/>
                 <outlet property="wsPath" destination="Anc-Zc-Ixg" id="MRm-gH-Exm"/>
                 <outlet property="wsView" destination="EDO-0J-rK1" id="vRX-kZ-tQm"/>

V2rayU/Base.lproj/QrcodeWindow.xib

@@ -10,6 +10,7 @@
             <connections>
                 <outlet property="shareQrcode" destination="A7n-ua-0nz" id="osg-S9-FM3"/>
                 <outlet property="shareUri" destination="u9M-IA-5nP" id="jNY-gA-XtE"/>
+                <outlet property="window" destination="QvC-M9-y7g" id="cqA-r1-G1j"/>
             </connections>
         </customObject>
         <customObject id="-1" userLabel="First Responder" customClass="FirstResponder"/>

V2rayU/MainMenu.swift

@@ -231,7 +231,7 @@ class MenuController: NSObject, NSMenuDelegate {
         }
 
         // config window title is "V2rayU"
-        if object.title == "V2rayU" {
+        if object.title == "V2rayU" && self.closedByConfigWindow == false {
             self.hideDock()
         }
     }