Fix tab layout visibility

TrasferimentoProgrammiOkuma.App/Form1.vb

@@ -69,16 +69,28 @@ Public Class Form1
         Size = New Size(1120, 760)
         StartPosition = FormStartPosition.CenterScreen
 
+        Dim shell As New TableLayoutPanel With {
+            .Dock = DockStyle.Fill,
+            .ColumnCount = 1,
+            .RowCount = 2,
+            .Margin = Padding.Empty,
+            .Padding = Padding.Empty
+        }
+        shell.RowStyles.Add(New RowStyle(SizeType.AutoSize))
+        shell.RowStyles.Add(New RowStyle(SizeType.Percent, 100))
+        Controls.Add(shell)
+
         Dim mainMenu = BuildMainMenu()
         MainMenuStrip = mainMenu
-        Controls.Add(mainMenu)
+        mainMenu.Dock = DockStyle.Fill
+        shell.Controls.Add(mainMenu, 0, 0)
 
-        Dim tabs As New TabControl With {.Dock = DockStyle.Fill}
+        Dim tabs As New TabControl With {.Dock = DockStyle.Fill, .Margin = Padding.Empty}
         Dim tabTrasferimento As New TabPage("Trasferimento programmi")
         Dim tabStatoMoxa As New TabPage("Stato Moxa")
         tabs.TabPages.Add(tabTrasferimento)
         tabs.TabPages.Add(tabStatoMoxa)
-        Controls.Add(tabs)
+        shell.Controls.Add(tabs, 0, 1)
 
         Dim root As New TableLayoutPanel With {
             .Dock = DockStyle.Fill,