Add save/restore layout buttons to Monitoring grid

Added "Save Layout" and "Restore Default Layout" buttons to the Monitoring tab, allowing users to save and restore the grid layout for GridView5. The layout is persisted as an XML file in the user's app data directory. On form load, the layout is restored if the file exists. Button event handlers provide user feedback, and control positions were adjusted to fit the new buttons.

App/EmailProfiler.Form/frmMain.vb

@@ -98,6 +98,11 @@ Public Class frmMain
             txtMonitoringConfig.Text = "500"
         End If
         LoadMonitoringIntoGrid()
+
+        Dim layoutPath As String = System.IO.Path.Combine(Application.UserAppDataPath, "gridMonitoringLayout.xml")
+        If System.IO.File.Exists(layoutPath) Then
+            GridView5.RestoreLayoutFromXml(layoutPath)
+        End If
     End Sub
 
     Private Sub frmMain_Shown(sender As Object, e As EventArgs) Handles Me.Shown
@@ -1087,4 +1092,20 @@ Public Class frmMain
     Private Sub btnRefresh_Click(sender As Object, e As EventArgs) Handles btnRefresh.Click
         LoadMonitoringIntoGrid()
     End Sub
+
+    Private Sub btnSaveLayout_Click(sender As Object, e As EventArgs) Handles btnSaveLayout.Click
+        Dim layoutPath As String = System.IO.Path.Combine(Application.UserAppDataPath, "gridMonitoringLayout.xml")
+        GridView5.SaveLayoutToXml(layoutPath)
+        MessageBox.Show("Layout gespeichert!")
+    End Sub
+
+    Private Sub btnRestoreDefaultLayout_Click(sender As Object, e As EventArgs) Handles btnRestoreDefaultLayout.Click
+        Dim layoutPath As String = System.IO.Path.Combine(Application.UserAppDataPath, "gridMonitoringLayout.xml")
+        If System.IO.File.Exists(layoutPath) Then
+            System.IO.File.Delete(layoutPath)
+        End If
+        ' Grid neu laden, damit das Defaultlayout angezeigt wird
+        LoadMonitoringIntoGrid()
+        MessageBox.Show("Standardlayout wurde wiederhergestellt!")
+    End Sub
 End Class