Add images for the guiShapes in the netedit vType attributes editor

[angelobanse]

• [x] vshape_ant
• [x] vshape_bicycle
• [x] vshape_bus
• [x] vshape_bus_coach
• [x] vshape_bus_flexible
• [x] vshape_bus_trolley
• [x] vshape_delivery
• [x] vshape_e_vehicle
• [x] vshape_emergency
• [x] vshape_firebrigade
• [x] vshape_moped
• [x] vshape_motorcycle
• [x] vshape_passenger
• [x] vshape_passenger_hatchback
• [x] vshape_passenger_sedan
• [x] vshape_passenger_van
• [x] vshape_passenger_wagon
• [x] vshape_pedestrian
• [x] vshape_police
• [x] vshape_rail
• [x] vshape_rail_car
• [x] vshape_rail_cargo
• [x] vshape_rickshaw
• [x] vshape_scooter
• [x] vshape_ship
• [x] vshape_truck
• [x] vshape_truck_1trailer
• [x] vshape_truck_semitrailer

[angelobanse]

possibly change the background to black https://github.com/eclipse/sumo/blob/46d25eca05a5b712db31e91a64e202a32f64b6be/src/netedit/dialogs/GNEVehicleTypeDialog.cpp#L264