Added Game Instance, some UI to Direct Connect (enter IP) in main menu

UI menu logic moved to Game Instance BP. Game instance persists when levels are closed and different gamemodes, characters ect are used.

Added Direct Connect window.
Does not actually connect just yet, just saves servers to list and lets you delete from the list.

Renamed some Blueprints

Config/DefaultEngine.ini

@@ -10,7 +10,7 @@ ThreePlayerSplitscreenLayout=FavorTop
 FourPlayerSplitscreenLayout=Grid
 bShowAllPlayerWidgetsWhenSplitscreenDisabled=False
 bOffsetPlayerGamepadIds=False
-GameInstanceClass=/Script/Engine.GameInstance
+GameInstanceClass=/Game/ProofOfConcept/DDIGameInstance_BP.DDIGameInstance_BP_C
 GameDefaultMap=/Game/Worlds/MainMenu.MainMenu
 ServerDefaultMap=/Engine/Maps/Entry.Entry
 GlobalDefaultGameMode=/Script/Engine.GameModeBase