The fewer steps and the less time it takes to do something the better I like it. May I make the following suggestion for how inventory is viewed.
Instead of having every item proceeded by its type
Part/Bricks
Parts/ Plates
Etc.
Can we just have headings in Bold
PARTS
Bricks
Plates
Etc
It is easier to follow the edge of a line then the middle when scrolling down the page.
Also, instead of listing the item types alphabetically list them according to popularity (?). So Sets, Parts, Minifigures, Gear, Instructions, etc. This way you aren't needlessly scrolling through the items that you don't deal with much to get to the ones you do.
Just a suggestion,
Katie