Converts AdminMenu to partially use XAML (#3231)

Content.Client/UserInterface/AdminMenu/CustomControls/CommandButton.cs

@@ -0,0 +1,38 @@
+#nullable enable
+using Robust.Client.Console;
+using Robust.Client.UserInterface.Controls;
+using Robust.Shared.IoC;
+
+namespace Content.Client.UserInterface.AdminMenu.CustomControls
+{
+    public class CommandButton : Button
+    {
+        public string? Command { get; set; }
+
+        public CommandButton() : base()
+        {
+            OnPressed += Execute;
+        }
+
+        protected virtual bool CanPress()
+        {
+            return string.IsNullOrEmpty(Command) ||
+                   IoCManager.Resolve<IClientConGroupController>().CanCommand(Command);
+        }
+
+        protected override void EnteredTree()
+        {
+            if (!CanPress())
+            {
+                Visible = false;
+            }
+        }
+
+        protected virtual void Execute(ButtonEventArgs obj)
+        {
+            // Default is to execute command
+            if (!string.IsNullOrEmpty(Command))
+                IoCManager.Resolve<IClientConsoleHost>().ExecuteCommand(Command);
+        }
+    }
+}