Prusa MK2 MK2S Extruder Idler Remix to be stronger

This was remixed from the original Prusa part, my original one broke at the top where the lever part comes out. So I have filleted it around the top where it broke and also made the lever a little bit longer. It is now much stronger :)

When printing I used more layers and infill than the original as well.

Please post a make if you print one, it's always good to see one someone else has made.