instanciate an Article with new to be able to use the $save method on the article model
add availableQuantity property to article
change location to /article/:id when clicking on an article in the list and added hover effect
move article/article-list to view/overview and article/article-form to view/article-form as a preparation for creating the new main view
Add article quantity history
Use subselect query to overcome the n+1 query problem (FetchMode.JOIN does not work for some reason)
Add creation date to quantity history and order by descending
Change order of article detail quantities
Add article history entry form (saving not supported yet)
History entry form can now be submitted
Rename "Anfangsbestand" to "Menge Eigentum" as the ownedQuantity can change
Recalculate quantities on article on client side
Quantities are no longer stored on the article. Instead, get the information by "event sourcing"
quantity changes are recalculated on the client side equally as on server