Content update for UI prediction (#27214)

* Content update for UI refactor

* Big update

* Sharing

* Remaining content updates

* First big update

* Prototype updates

* AUGH

* Fix UI comp ref

* Cleanup

- Fix predicted message, fix item slots, fix interaction range check.

* Fix regressions

* Make this predictive

idk why it wasn't.

* Fix slime merge

* Merge conflict

* Fix merge

Content.IntegrationTests/Tests/Interaction/InteractionTest.Helpers.cs

@@ -820,7 +820,7 @@ public abstract partial class InteractionTest
             return false;
         }
 
-        if (!ui.OpenInterfaces.TryGetValue(key, out bui))
+        if (!ui.ClientOpenInterfaces.TryGetValue(key, out bui))
         {
             if (shouldSucceed)
                 Assert.Fail($"Entity {SEntMan.ToPrettyString(SEntMan.GetEntity(target.Value))} does not have an open bui with key {key.GetType()}.{key}.");