Feature Request: Efficient entry sorting

[jorbosaur]

General problem: Sorting entries can only be done by manually moving them up or down one step at a time.

Proposed solutions:

1. Would like to sort columns automatically by double-clicking on them to sort by value/name, alphabetically, list layout, or whatever makes sense for the datatype in question.
2. Would like to be able to manually enter a value in the leftmost ordinal column.
3. Would like to be able to drag and drop entries to arrange them.

Any/all of those would be sweet.