Voting (#3185)

* Basic voting

* Rewrite lobby in XAML.
Working lobby voting.

* Escape menu is now XAML.

* Vote menu works, custom votes, gamemode votes.

* Vote timeouts & administration.

Basically done now.

* I will now pretend I was never planning to code voting hotkeys.

* Make vote call UI a bit... funny.

* Fix exception on round restart.

* Fix some vote command definitions.

Content.Client/UserInterface/LobbyGui.xaml.cs

@@ -0,0 +1,124 @@
+using Content.Client.Chat;
+using Content.Client.Interfaces;
+using Robust.Client.AutoGenerated;
+using Robust.Client.Graphics;
+using Robust.Client.UserInterface;
+using Robust.Client.UserInterface.Controls;
+using Robust.Client.UserInterface.XAML;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Maths;
+
+namespace Content.Client.UserInterface
+{
+    [GenerateTypedNameReferences]
+    internal sealed partial class LobbyGui : Control
+    {
+        public Label ServerName => CServerName;
+        public Label StartTime => CStartTime;
+        public Button ReadyButton => CReadyButton;
+        public Button ObserveButton => CObserveButton;
+        public Button OptionsButton => COptionsButton;
+        public Button LeaveButton => CLeaveButton;
+        public ChatBox Chat => CChat;
+        public VBoxContainer VoteContainer => CVoteContainer;
+        public LobbyPlayerList OnlinePlayerList => COnlinePlayerList;
+        public ServerInfo ServerInfo => CServerInfo;
+        public LobbyCharacterPreviewPanel CharacterPreview { get; }
+
+        public LobbyGui(IEntityManager entityManager,
+            IClientPreferencesManager preferencesManager)
+        {
+            RobustXamlLoader.Load(this);
+
+            ServerName.SizeFlagsHorizontal = SizeFlags.Expand | SizeFlags.ShrinkCenter;
+
+            CharacterPreview = new LobbyCharacterPreviewPanel(
+                entityManager,
+                preferencesManager)
+            {
+                SizeFlagsHorizontal = SizeFlags.None
+            };
+
+            CLeftPanelContainer.AddChild(CharacterPreview);
+            CharacterPreview.SetPositionFirst();
+        }
+    }
+
+    public class LobbyPlayerList : Control
+    {
+        private readonly ScrollContainer _scroll;
+        private readonly VBoxContainer _vBox;
+
+        public LobbyPlayerList()
+        {
+            var panel = new PanelContainer()
+            {
+                PanelOverride = new StyleBoxFlat {BackgroundColor = Color.FromHex("#202028")},
+            };
+            _vBox = new VBoxContainer();
+            _scroll = new ScrollContainer();
+            _scroll.AddChild(_vBox);
+            panel.AddChild(_scroll);
+            AddChild(panel);
+        }
+
+        // Adds a row
+        public void AddItem(string name, string status)
+        {
+            var hbox = new HBoxContainer
+            {
+                SizeFlagsHorizontal = SizeFlags.FillExpand,
+            };
+
+            // Player Name
+            hbox.AddChild(new PanelContainer()
+            {
+                PanelOverride = new StyleBoxFlat
+                {
+                    BackgroundColor = Color.FromHex("#373744"),
+                    ContentMarginBottomOverride = 2,
+                    ContentMarginLeftOverride = 4,
+                    ContentMarginRightOverride = 4,
+                    ContentMarginTopOverride = 2
+                },
+                Children =
+                {
+                    new Label
+                    {
+                        Text = name
+                    }
+                },
+                SizeFlagsHorizontal = SizeFlags.FillExpand
+            });
+            // Status
+            hbox.AddChild(new PanelContainer()
+            {
+                PanelOverride = new StyleBoxFlat
+                {
+                    BackgroundColor = Color.FromHex("#373744"),
+                    ContentMarginBottomOverride = 2,
+                    ContentMarginLeftOverride = 4,
+                    ContentMarginRightOverride = 4,
+                    ContentMarginTopOverride = 2
+                },
+                Children =
+                {
+                    new Label
+                    {
+                        Text = status
+                    }
+                },
+                SizeFlagsHorizontal = SizeFlags.FillExpand,
+                SizeFlagsStretchRatio = 0.2f,
+            });
+
+            _vBox.AddChild(hbox);
+        }
+
+        // Deletes all rows
+        public void Clear()
+        {
+            _vBox.RemoveAllChildren();
+        }
+    }
+}