PRS DESKTOP - Allow user to change mobile credential link expiry time

prs.desktop/Panels/Users/UserGrid.cs

@@ -50,7 +50,13 @@ namespace PRSDesktop
             string ioslink = @"prsmobile://open/";
             string androidlink = @"http://www.prsmobile.com/open/";
 
-            string toEncrypt = App.DatabaseSettings.URL + "," + App.DatabaseSettings.Port + "," + user.UserID + "," + user.Password + "," + DateTime.Now.AddMinutes(5);
+            int expiry = 10;
+            var edt = new NumberEdit("Enter link expiry time in minutes", 10, 300, 10);
+            var result = edt.ShowDialog();
+            if (result == true)
+                expiry = edt.Value;
+
+            string toEncrypt = App.DatabaseSettings.URL + "," + App.DatabaseSettings.Port + "," + user.UserID + "," + user.Password + "," + DateTime.Now.AddMinutes(expiry);
             string encrypted = Encryption.Encrypt(toEncrypt, "logindetailslink", true);
 
             ioslink = ioslink + encrypted;
@@ -60,7 +66,7 @@ namespace PRSDesktop
                 "For Apple devices, click this link: " + ioslink + Environment.NewLine + Environment.NewLine
                 + "For Android devices (Samsung, Google, Xiaomi, Oppo, Vivo, Huawei, Motorola etc), click this link: " + androidlink + Environment.NewLine + Environment.NewLine +
                 "Please restart the app after loading from the link." + Environment.NewLine + Environment.NewLine +
-                "These links will expire after 10 minutes";
+                "These links will expire after " + expiry + " minutes.";
 
             EmailUtils.CreateEMLFile(user.EmailAddress, "PRS Mobile Configuration Links", emailcontent);