Couple small updates

Changed the "Percent Complete" input in Stitcher's Helper to accept and save decimal values.

The matron of Yarn Inventory mentioned a feature her friend would like to have:  A length/weight calculator.  Input the original weight/length of a ball of yarn, then input the current weight and it approximates the current length.

This works exceptionally well with the templates, as I can pre-fill the original weight and length.
Update: If you have an eagle eye you may have spotted the bug in the above screenshots. I fixed it! :)