Monsters should be able to be grouped and order themselves based on the groups

Selected monsters should be able to be placed into a group. i.e. If I have six goblins (named "Goblin A", "Goblin B", ... , "Goblin F") I should be able to select Goblin A, Goblin C, and Goblin D and group them into a group called "Cave 1" (indicating that these goblins are in an area called "Cave 1". These goblins should rearrange themselves to be put together, all other goblins should be before or after the group. Unordered goblins are technically in their own hidden group until actually grouped.