tloadscreen: use blank spaces for animation size label

This reserved space for the label while removing the slight glimpse
of the full string when the loadscreen first shows.

data/gui/window/loadscreen.cfg

@@ -128,7 +128,7 @@
 						text_alignment = "center"
 						definition = "default_large"
 						id = "test_animation"
-						label = "...................."
+						label = "                    "
 					[/label]
 
 				[/column]