Makes the graphics menu in the stock UI mostly functional again

Adds sanity check to editing of gameasset script action in asset browser
Updates module template file
Updates visualizers
Fixes checking of popup menu items
Adds stub for TerrainMaterialAsset

Templates/BaseGame/game/data/ExampleModule/components/ExampleComponent.asset.taml

@@ -0,0 +1,9 @@
+<ComponentAsset
+    canSave="true"
+    canSaveDynamicFields="true"
+    AssetName="ExampleComponent"
+    componentName="ExampleComponent"
+    componentClass="Component"
+    description="An example script component."
+    scriptFile="@assetFile=ExampleComponent.cs"
+    VersionId="1" />

Templates/BaseGame/game/data/ExampleModule/components/ExampleComponent.cs

@@ -0,0 +1,26 @@
+//onAdd is called when the component is created and then added to it's owner entity.
+//You would also add any script-defined component fields via addComponentField().
+function ExampleComponent::onAdd(%this)
+{
+    
+}
+//onAdd is called when the component is removed and deleted from it's owner entity.
+function ExampleComponent::onRemove(%this)
+{
+    
+}
+//onClientConnect is called any time a new client connects to the server.
+function ExampleComponent::onClientConnect(%this, %client)
+{
+    
+}
+//onClientDisconnect is called any time a client disconnects from the server.
+function ExampleComponent::onClientDisonnect(%this, %client)
+{
+
+}
+//update is called when the component does an update tick.
+function ExampleComponent::Update(%this)
+{
+    
+}