One common pattern in the game is to do monoliths and then, when my inventory is full, I drop everything on the ground to see what my loot filter says about different items (e.g., one color for items to shatter, another color for items that are likely upgrades, another color for items that are potential upgrades). However, the process of dropping items on the ground adds a lot of unnecessary time and removes me from the flow of the game.
If there were a way to highlight all items in my inventory (or even better if it also worked in stash) with the same color as my loot filter would highlight them, it would make inventory management much less cumbersome.