* Store RNA collections different in ID properties, using a generic
ID property array, using the patch provided by Joe.
* Fix bug accessing registered operator properties in the wm from the
outliner.
* In the outliner, only use the RNA icon for RNA data, and use dot
again for unknown icon.
* Also, show pointer properties data in the second column, and auto
expand two levels when opening them.
* Added small RNA_struct_defined_properties function to get only the
defined properties without builtin and undefined id properties
(for py operators).
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