Add ability to enter in a ranking for features and master features to organize

In order to rearrange features in a release we have to move them around and it makes forever when you have 70+ in a release. It would be nice to have a field we could enter in a number and have the relese sort on that field If we chose. Right now we do this with the score field but there isn't an option to sort it lowest to highest so I have to start at the bottom of my priority and make that number 1 an work my way up to the highest priority in order for it to order in the way I want on the list.