Base: Small bug fixes
Base: Small bug fixes

Correct log scale for different sort groups
Prevent error when file import is selected but no file is given

OpenSprinkler/OpenSprinkler-App,PeteBa/OpenSprinkler-App,OpenSprinkler/OpenSprinkler-App,PeteBa/OpenSprinkler-App,PeteBa/OpenSprinkler-App,OpenSprinkler/OpenSprinkler-App