I'm not sure if my party is the only ones that are annoyed by this but I think there should be a rarity filter on the inventory. Especially if your DM allows you to have a Legendary Item and you have to scroll all the way down to the bottom. 

It sounds like you're trying to browse items in the 'add items' portion of the inventory on the character sheet. That's really meant more for 'lookup specific item to add to character inventory.' For browsing to determine what item you want to add, I suggest using the Magic Items page, which does have the kind of filters you're looking for.