Changes countdown to minutes:seconds

src/Lithnet.IdleLogoff/LogoffWarning.cs

@@ -4,6 +4,7 @@
 using System.Data;
 using System.Diagnostics;
 using System.Drawing;
+using System.Globalization;
 using System.Linq;
 using System.Text;
 using System.Threading;
@@ -58,13 +59,15 @@ private void Timer_Tick(object sender, EventArgs e)
 
         private void UpdateLabelText()
         {
-            if (this.LogoffDateTime > DateTime.Now)
+            TimeSpan remaining = this.LogoffDateTime.Subtract(DateTime.Now);
+
+            if (remaining.Ticks > 0)
             {
                 string message = Settings.WarningMessage;
 
                 if (message.Contains("{0}"))
                 {
-                    message = string.Format(message, (int)((this.LogoffDateTime.Subtract(DateTime.Now)).TotalSeconds));
+                    message = string.Format(message, $"{(int)remaining.TotalMinutes}{CultureInfo.CurrentCulture.DateTimeFormat.TimeSeparator}{remaining.Seconds:00}");
                 }
 
                 this.lbWarning.Text = message;

src/Lithnet.IdleLogoff/PolicyDefinitions/en-US/lithnet.idlelogoff.adml

@@ -8,9 +8,9 @@
       <string id="cat_idle_logoff">IdleLogoff</string>
       <string id="pol_enable_idle_logoff">Log off inactive users</string>
       <string id="pol_show_warning_message">Show a warning message before logging off</string>
-      <string id="pol_show_warning_message_help">Shows a pop up notification informing the user of the number of seconds remaining before they are logged off.
+      <string id="pol_show_warning_message_help">Shows a pop up notification informing the user of the time remaining before they are logged off.
 
-        You can optionally provide a custom message to show the user. Use {0} as a placeholder for the remaining seconds until logoff.
+        You can optionally provide a custom message to show the user. Use {0} as a placeholder for the remaining time until logoff.
       </string>
       <string id="string_logoff">Log off</string>
       <string id="string_reboot">Reboot</string>
@@ -23,7 +23,7 @@
         <decimalTextBox refId="txt_warning_period" defaultValue="0">Duration of warning message (seconds)</decimalTextBox>
         <textBox refId="txt_warning_message">
           <label>Warning message text</label>
-          <defaultValue>Your session has been idle for too long, and you will be logged out in {0} seconds</defaultValue>
+          <defaultValue>Your session has been idle for too long, and you will be logged out in {0}</defaultValue>
         </textBox>
       </presentation>
       <presentation id="pol_enable_idle_logoff">

src/Lithnet.IdleLogoff/Settings.cs

@@ -340,7 +340,7 @@ public static string WarningMessage
 
                 if (string.IsNullOrWhiteSpace(value))
                 {
-                    return "Your session has been idle for too long, and you will be logged out in {0} seconds";
+                    return "Your session has been idle for too long, and you will be logged out in {0}";
                 }
                 else
                 {