Epic RPG: Leveling Rank

- Damage per level slightly increased - The health of entities configured as "boss:true" scales double - The amount of health per difficulty was adjusted to better scalability - An item was added to configure the difficulty of the selected entity - An item was added to configure the difficulty of entities - The interface was changed and now opens from a configurable button (X by default) - The minimum difficulty mission requirement was separated from the dimension requirement - Crystals no longer open the interface; they are now the key to start the event