Contributor Resource wiki pages

Hi Authors, Jean

I updated some parts for Chap 2 of the wiki with respect to icons,
inserting images, dialogs, screenshots, drawings.

https://wiki.documentfoundation.org/Documentation/DocumentationTeamInfo/ProducingLibreOfficeUserGuides

I think this page is very long and my changes are scattered. Can we
split the page into 2 or 3?

Regards

I think splitting it into several pages is a good idea.
Jean