Currently, we only support adding blueprints with the minimum size of filesystem partition only if it is either in KiB, MiB or GiB. If there is a different number of bytes, that is not exactly divisible by KiB, MiB or GiB, the wizard shows "undefined".

This way, if someone creates a blueprint with different amount of bytes using API, and then tries to edit it in a UI, the value in the text box is "undefined". 

This influences also the import feature - there we should definitely validate what kind of input are we passing to the textbox - suddenly all types can be in the json, and we should prevent passing incorrect values there.