Added a header to the gameplay topic list

data/core/help.cfg

@@ -173,7 +173,9 @@ The interactive <bold>text='Tutorial'</bold> introduces the basics of Wesnoth ga
 After you master the basics, try out a beginner campaign, such as <italic>text='Heir to the Throne'</italic> or <italic>text='The South Guard'</italic>. A full list of installed campaigns can be found via the <bold>text='Campaign'</bold> option on the main menu. As Wesnoth can be quite challenging, you may wish to start on easy before progressing to higher difficulties." + "
 
 <img>src=help/tooltip.png align=right float=yes</img>" +
-        _ "While playing, keep in mind that you can mouse-over many items in the game, such as the information displayed in the status pane, to see a brief description explaining each item. This is especially useful when you encounter new elements, such as <ref>dst='..abilities_section' text='abilities'</ref>, for the first time.
+        _ "While playing, keep in mind that you can mouse-over many items in the game, such as the information displayed in the status pane, to see a brief description explaining each item. This is especially useful when you encounter new elements, such as <ref>dst='..abilities_section' text='abilities'</ref>, for the first time." + _ "
+
+<header>text='Fundamentals of Gameplay'</header>
 
 "
         generator="contents:gameplay"