78498: Do not keep OutlineLevel attribute at paragraph when a Paragraph Style is assigned.
78498:  WW8 import - improvements/corrections regarding outline level & Co

- import outline level attribute at Paragraph Styles
- import outline level attribute at paragraphs
- refactor code to apply list level properties to Outline Style
-- only consider WW8 list styles applied to WW8 Built-in Heading Styles
-- only assign AOO counterparts of WW8 Built-in Heading Styles to Outline Style