Improves kick, teleport and ban menus (#3312)

Content.Client/UserInterface/AdminMenu/CustomControls/PlayerListControl.xaml

@@ -0,0 +1,13 @@
+<VBoxContainer
+    xmlns="https://spacestation14.io">
+    <Control CustomMinimumSize="0 5" />
+    <HBoxContainer>
+        <!-- <Label Text="{Loc Search}" CustomMinimumSize="100 0" /> -->
+        <!-- <Control CustomMinimumSize="50 0" /> -->
+        <LineEdit Name="FilterLineEdit" CustomMinimumSize="100 0" SizeFlagsHorizontal="FillExpand" PlaceHolder="{Loc Filter}"/>
+    </HBoxContainer>
+    <!-- <Control CustomMinimumSize="0 5" /> -->
+    <ItemList
+        Name="PlayerItemList" SelectMode="Single" SizeFlagsVertical="FillExpand" SizeFlagsHorizontal="FillExpand"
+        CustomMinimumSize="100 100" />
+</VBoxContainer>

Content.Client/UserInterface/AdminMenu/CustomControls/PlayerListControl.xaml.cs

@@ -0,0 +1,78 @@
+#nullable enable
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Robust.Client.AutoGenerated;
+using Robust.Client.Player;
+using Robust.Client.UserInterface.Controls;
+using Robust.Shared.IoC;
+
+namespace Content.Client.UserInterface.AdminMenu.CustomControls
+{
+    [GenerateTypedNameReferences]
+    public partial class PlayerListControl : VBoxContainer
+    {
+        private List<IPlayerSession>? _data;
+
+        public event Action<IPlayerSession?>? OnSelectionChanged;
+
+        protected override void EnteredTree()
+        {
+            // Fill the Option data
+            _data = IoCManager.Resolve<IPlayerManager>().Sessions.ToList();
+            PopulateList();
+            PlayerItemList.OnItemSelected += PlayerItemListOnOnItemSelected;
+            PlayerItemList.OnItemDeselected += PlayerItemListOnOnItemDeselected;
+            FilterLineEdit.OnTextChanged += FilterLineEditOnOnTextEntered;
+        }
+
+        private void FilterLineEditOnOnTextEntered(LineEdit.LineEditEventArgs obj)
+        {
+            PopulateList(FilterLineEdit.Text);
+        }
+
+        private static string GetDisplayName(IPlayerSession session)
+        {
+            return $"{session.Name} ({session.AttachedEntity?.Name})";
+        }
+
+        private void PlayerItemListOnOnItemSelected(ItemList.ItemListSelectedEventArgs obj)
+        {
+            var selectedPlayer = (IPlayerSession) obj.ItemList[obj.ItemIndex].Metadata!;
+            OnSelectionChanged?.Invoke(selectedPlayer);
+        }
+
+        private void PlayerItemListOnOnItemDeselected(ItemList.ItemListDeselectedEventArgs obj)
+        {
+            OnSelectionChanged?.Invoke(null);
+        }
+
+        private void PopulateList(string? filter = null)
+        {
+            // _data should never be null here
+            if (_data == null)
+                return;
+            PlayerItemList.Clear();
+            foreach (var session in _data)
+            {
+                var displayName = GetDisplayName(session);
+                if (!string.IsNullOrEmpty(filter) &&
+                    !displayName.ToLowerInvariant().Contains(filter.Trim().ToLowerInvariant()))
+                {
+                    continue;
+                }
+
+                PlayerItemList.Add(new ItemList.Item(PlayerItemList)
+                {
+                    Metadata = session,
+                    Text = displayName
+                });
+            }
+        }
+
+        public void ClearSelection()
+        {
+            PlayerItemList.ClearSelected();
+        }
+    }
+}