Implement Logic for CustomerLayout and ProjectManager in UpdateOfferView#945

Steffengreiner wants to merge 4 commits intofeature/Dm-346-update-offer-ui-overhaulqbicsoftware/offer-manager-2-portlet:feature/Dm-346-update-offer-ui-overhaulfrom

feature/dm-355-Customer-ProjectManager-Layoutqbicsoftware/offer-manager-2-portlet:feature/dm-355-Customer-ProjectManager-LayoutCopy head branch name to clipboard