Often when you're using toolbar filters (to limit a space to one item), the item in question can jump back to your inventory, or another space in the toolbar, if you don't press Q before selecting the other item.
A mod that would automatically "pull" these items back to the correct slot would be great: eg if I have any blue inserters in my inventory or toolbar, and a filter slot on the toolbar, the filter slot always fills first before the rest of the items are placed elsewhere in my inventory
