To reproduce...

• create a (course) category structure a few deep
• navigate down through the categories
• Click 'Manage this category'

There is now no way back out again to where you where before. The only option seems to be to return to the home page and then navigate back through the categories again.... which is irritating.

I thought to add this as a feature suggestion but it feels more like an oversight that the 'Manage this category' link does not change to something like 'Finish managing this category'.