Changed the horizontal growth in the title screen.

Implementing some ideas suggested by Eleazar in the forum [1].

[1] http://www.wesnoth.org/forum/viewtopic.php?t=31765

data/gui/default/window/title_screen.cfg

@@ -38,17 +38,14 @@
 
 [/window_definition]
 
-#define _GUI_H_SPACER
+#define _GUI_H_SPACER WIDTH GROW_FACTOR 
 	[column]
 
+		grow_factor = "{GROW_FACTOR}"
+
 		[spacer]
-			# 17 emperical determined the border is 20 pixels at 768 and
-			# offsetted for the 5 pixels border between widgets this value
-			# seems right
-			#
-			# NOTE the engine doesn't recalculate the height upon scaling.
 			definition = "default"
-			width = "((17 * screen_width) / 768)"
+			width = "{WIDTH}"
 		[/spacer]
 
 	[/column]
@@ -294,32 +291,29 @@
 								[row]
 									grow_factor = 1
 
-									{_GUI_H_SPACER}
+									{_GUI_H_SPACER 17 1}
 
 									[column]
 										vertical_alignment = "bottom"
 										horizontal_alignment = "left"
-
-										# Send the growth to one of the columns that can grow.
-										# This to avoid the spacers to grow.
-										grow_factor = 1
-
 										{_GUI_TIP_SECTION}
 									[/column]
 
+									{_GUI_H_SPACER 0 3}
+
 									[column]
 										horizontal_alignment = "right"
 										vertical_alignment = "bottom"
 										{_GUI_MENU_SECTION}
 									[/column]
 
-									{_GUI_H_SPACER}
+									{_GUI_H_SPACER 17 1}
 
 								[/row]
 
 								[row]
 
-									{_GUI_H_SPACER}
+									{GUI_FILLER}
 
 									[column]
 										horizontal_alignment = "left"
@@ -331,8 +325,11 @@
 
 									[/column]
 
+									{GUI_FILLER}
+
 									{_GUI_V_SPACER}
-									{_GUI_H_SPACER}
+
+									{GUI_FILLER}
 
 								[/row]