Can the mods make an option in the inventories for easier item sorting? It's really frustrating to have to click and click items to be able to sort them into, for example, the wardrobe or different collections.

You can use your shop's quickstock function to move multiple items into the wardrobe or other areas. There's also a gold account perk to move multiple items to collections. link (don't post there!)

Oh! I didn't know that. Thanks!