Feature/115 delete transect

Closes #115 (closed)

In this MR there is also a quick-fix for saving FilterHistory with external filter (Taxonomy Filter which is not in api-base package).

Example request that was failing before the fix:

mutation{
    createFilterHistory(
        input: {
            label: "Filter observations by abundance range"
            type: "inspection"
            isFavorite: true   #defaults to false when omitted
         
            filter: { 
                id_is: "2",
                taxonomy_genus_contains: "Pyr"
            }
        } ) {
            filterHistory { 
                id 
                label
                filter    
                isFavorite
            }
        }
    }