Update MainMenuGUI.ini

Enlarge credits screen to make room for the "back to main" button.
Change the credits panel in accordance with the new method of displaying credits.

Author: orengg

Base.rte/GUIs/MainMenuGUI.ini

@@ -1920,7 +1920,7 @@ Parent = root
 X = 20
 Y = 132
 Width = 600
-Height = 280
+Height = 320
 Visible = True
 Enabled = True
 Name = CreditsScreen
@@ -1933,9 +1933,9 @@ DrawColor = 62
 ControlType = COLLECTIONBOX
 Parent = CreditsScreen
 X = 0
-Y = 124
+Y = 0
 Width = 600
-Height = 300
+Height = 280
 Visible = True
 Enabled = True
 Name = CreditsPanel