Remove the width limit from the campaign dialogue.

The previous limit was an artificial limit, using the character limit
feels less arbitrary. Did some other cosmetic fixes to let the dialogue
look nicely for different window widths.

data/gui/default/window/campaign_dialog.cfg

@@ -13,7 +13,6 @@
 		automatic_placement = "true"
 		vertical_placement = "center"
 		horizontal_placement = "center"
-		maximum_width = 800
 		maximum_height = 600
 
 		[linked_group]
@@ -333,8 +332,8 @@
 										[row]
 
 											[column]
-													horizontal_alignment = "center"
+												horizontal_grow = "true"
-													vertical_alignment = "top"
+												vertical_alignment = "top"
 
 												[scrollbar_panel]
 
@@ -346,14 +345,14 @@
 															[column]
 																border = "all"
 																border_size = 5
-																horizontal_alignment = "center"
+																horizontal_alignment = "left"
 																vertical_alignment = "top"
 
 																[label]
 																	id = "description"
 																	definition = "default"
 
-																	wrap = "true"
+																	characters_per_line = 66
 																[/label]
 
 															[/column]