I notice that the headers for each column on the gear list are clickable.
Clicking on "Slot" sorts the list by the name of the slot alphabetically. Clicking on "Item" sorts it by the order that they show on the character tab in the game. Clicking on "Gems" seems to sort it alphabetically by the name of the item. Clicking on "Enchant" does something, but I'm not sure exactly what it's trying to sort by. Clicking on "Source" is also doing something but not sorting by source. Clicking on "iLvl" seems to sort the list by Source.
There are also a few places in empty space you can click that do some kind of sorting but it's hard to tell what.
It seems to me that the clickable areas for the column sorting are not lined up right and/or the boundaries for the columns are not easy to find and click.
The main thing I would love to see is the iLvl sorting. I clicked every space on the column header and nowhere does it cause the list to be sorted by iLvl. Any other sorting would just be a bonus as far as I'm concerned.