Oldchat (#11913)

* attempt at moving MainViewport to UIWidget

* oldchat (prototype)

* separate oldchat and default ss14 HUD into their own files

* restores original default game screen logic and adds that logic into separated chat game screen

* hand reloading, several tweaks to port oldchat to main ss14 branch

oldchat is currently not selectable

* screen type cvar, gameplay state screen reloading/loading

* reload screen on ui layout cvar change

* fixes up basic reloading (HUD switching is still very bad)

* some UI widget reloading for main UI screen switching

* alert sync on screen change

* inventory reload

* hotbar margin fix

* chat bubbles above viewport

* whoops

* fixes ordering of speech bubble root

* should fix the chat focus issue (at least in-game, not lobby yet)

* should fix up the lobby/game chat focus

* fixes chat for lobby, turns lobby into a UI state

* viewport UI controller

* viewport ratio selection

* whoops

* adds the /tg/ widescreen ratio

* removes warning from inventory UI controller, adds background to separated chat game screen's chat portion

* menu button reload

* unload menu buttons only from gameplay state shutdown

* bugfix

* character button fix

* adds config options for viewport width/UI layout

* variable naming changes, get or null instead of get to avoid exceptions

* moves entity system get into controller

Content.Client/Hands/Systems/HandsSystem.cs

@@ -130,6 +130,16 @@ namespace Content.Client.Hands.Systems
         }
         #endregion
 
+        public void ReloadHandButtons()
+        {
+            if (!TryGetPlayerHands(out var hands))
+            {
+                return;
+            }
+
+            OnPlayerHandsAdded?.Invoke(hands);
+        }
+
         public override void DoDrop(EntityUid uid, Hand hand, bool doDropInteraction = true, SharedHandsComponent? hands = null)
         {
             base.DoDrop(uid, hand, doDropInteraction, hands);