Inline Editing of Fields in 'Detailed View' Pane

As a scrum master, I would like to be able to edit fields directly from the 'detail view' of the 'Plan' or 'Work' screens.

My team doesn't use a numeric system to score tasks, so I have a custom drop-down field with the possible options. This has a lot of downstream usability effects (I'll drop another feature request with some suggestions for that particular bee's nest), but the biggest pain-point we're having right now is that we have to open each issue individually to score it during sprint planning. I see that a few of the fields are editable now, but it would be awesome if we could allow or disallow editing on all of the fields instead of having a few hard-coded.