bugfix: create new stations, coordinate systems and transformation parameters
bugfix: load projects which contain stations without an active sensor
bugfix: load and save simulation plugins in database + crash when a sensor config is available but the corresponding plugin is missing
bugfix: open sensor pad without connection
bugfix: when adding an observation in function plugin dialog, do not duplicate them in geometries observation list
save and load measurement and sensor configs to and from project xml
bugfix: remove config tab from sensor plugin dialog + change save to set (button)