Blender Git Loki

Option to insert blank dummy decorator for uiItemFullR

When there are multiple items in a property split row (e.g. mirror axes
in the mirror modifier) the decorator would only apply to the first
element. A dummy decorator could be inserted manually by using
`uiItemL_respect_property_split()`, but it's better to let the UI code
have an option for that, the case is common enough.