Added utility method to prefab to be able to get the internal simGroup that contains it's children
Adjusted logic for mounting items in GuiShapeEdPreview to utilize assetIds for the shapes
Moved the Asset and AssetBrowser editor settings populate functions to the AssetBrowser script to better organize things
Fixed command usage for General, Player and Observer spawn point creator entries to use the correct callback commands
Fixed logic for creator callback commands that don't just route through the class name based structure
Added RMB context menu actions for opening asset file or folder locations in OS file explorer
Fixed lookup of animation assets when editing a shape's animations in the shape editor so it provides the assetId of the anim if it exists
Fixes handling of mounting in the shape editor so it utilizes assets and the asset browser like everything else
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