All computers play the keyboard sound + small research client cleanup (#7312)

Content.Server/Sound/Components/EmitSoundOnUIOpenComponent.cs

@@ -0,0 +1,10 @@
+namespace Content.Server.Sound.Components
+{
+    /// <summary>
+    /// Simple sound emitter that emits sound on AfterActivatableUIOpenEvent
+    /// </summary>
+    [RegisterComponent]
+    public sealed class EmitSoundOnUIOpenComponent : BaseEmitSoundComponent
+    {
+    }
+}