Remove some BUI boilerplate (#28399)

* Remove some BUI boilerplate

- The disposals overrides got removed due to the helper method handling it.
- Replace window creation with CreateWindow helper.
- Fixed some stinky code which would cause exceptions.

* More

* moar

* weh

* done

* More BUIs

* More updates

* weh

* moar

* look who it is

* weh

* merge

* weh

* fixes

Content.Client/UserInterface/Systems/Atmos/GasTank/GasTankBoundUserInterface.cs

@@ -1,5 +1,7 @@
 using Content.Shared.Atmos.Components;
 using JetBrains.Annotations;
+using Robust.Client.GameObjects;
+using Robust.Client.UserInterface;
 
 namespace Content.Client.UserInterface.Systems.Atmos.GasTank
 {
@@ -13,7 +15,7 @@ namespace Content.Client.UserInterface.Systems.Atmos.GasTank
         {
         }
 
-        public void SetOutputPressure(in float value)
+        public void SetOutputPressure(float value)
         {
             SendMessage(new GasTankSetPressureMessage
             {
@@ -29,9 +31,10 @@ namespace Content.Client.UserInterface.Systems.Atmos.GasTank
         protected override void Open()
         {
             base.Open();
-            _window = new GasTankWindow(this, EntMan.GetComponent<MetaDataComponent>(Owner).EntityName);
-            _window.OnClose += Close;
-            _window.OpenCentered();
+            _window = this.CreateWindow<GasTankWindow>();
+            _window.SetTitle(EntMan.GetComponent<MetaDataComponent>(Owner).EntityName);
+            _window.OnOutputPressure += SetOutputPressure;
+            _window.OnToggleInternals += ToggleInternals;
         }
 
         protected override void UpdateState(BoundUserInterfaceState state)