adding check that the computed engine speed is within the current section of the FLD in case the torque is constant

correcting existing testcase, additional testcase for distance computation, check if all required values are present for distance computation

vehicle form: when editing a vehicle in declaration mode, only show axle configurations that are allowed in declaration mode

Extend Driver functionality: if no operating point can be found because the vehicle already stopped and no acceleration > 0 can be achieved (e.g. because steep uphill and the gearbox is disengaged), insert a 'halt' action and drive off again

adding testcase for auxiliary types: read out allowed values from schema and make sure the lookup scceeds