Smarter list widget additions

**- Do you want to request a *feature* or report a *bug*?**

enhancement

**- What is the current behavior?**

Adding items to the list widget is painful - you have to:

* scroll to the add button up top
* click it
* scroll to the bottom of the list
* edit the newly added item
* reposition the item to desired location

**- What is the expected behavior?**

* scroll to desired new item location
* click an in-location add item button
* edit the new item
* rejoice

I imagine a full width button, maybe a dashed outline with a plus sign that appears between any two list items on hover.