fixing a bug due to Inventory access being unsafe
modified:   src/game/GameLoop.java
modified:   src/userInterface/Inventory.java
toward the features allowing to move items around within the inventory

modified:   src/userInterface/Inventory.java
modified:   src/utils/NonContinuousTable.java
it is now possible to change the object order in the inventory

modified:   src/event/control/PlayerControl.java
modified:   src/userInterface/Inventory.java