correct timeText and units in swedish translation

Thanks for your great timepicker. I noticed the swedish translation was incorrect and fixed it for my own project, thought you might want to include the correct translation in your project. I fixed the timeText which read "Hour". I also changed all the time units to singular form as you have in english. Plural would make sense when picking a duration but I suspect the main use case for this addon is picking a time.

Regards,
Zoee