Balanced Quick Stack

                                This Version of Quick Stack combines Quark's Chest only Insert All and Quickstack's Drop Off as well as a locking function I made to prevent items from being moved from the inventory by this mod's buttons. Press C key over an item in the inventory to lock it, only works in the player's inventory, and the Quick Stack buttons only appear in containers. I added a Shift + Left Click Dragging mechanic that moves items from inventory into containers and vice versa (that respects the locking mechanic). Also added compatibility with Sophisticated Backpacks. If you're using the mod with Quark or Mouse Tweaks, turn Quark's Easy Transferring to false and Mouse Tweak's  LMBTweakWithoutItem = 1 to 0.

1.16.5 has lock mechanics (Press C when hovering a slot in Player inventory)

1.20.1 Does not have lock mechanics, but has a really good config and buttons can be moved around and retextures with size and shape (you can make buttons look however you want with resource pack)