Fixing wrong numbered-list indentation in open document format

Fixes issue #369

The problem seems to stem from the fact that LibreOffice doesn't like the combination of numbered lists and anything to do with `fo:margin-left` `fo:margin-right` or indentation styles.

Looking at the code it seems these indentation specific attributes are triggered in `style:paragraph-properties` even in the "tight" style case, even though they seem to be independent. I have tested this with the test case and a few other simple documents, but I am unsure if I have overlooked anything.