apidocs: Fix dynamic resize issue

Author: afh

apidoc_header.html

@@ -30,9 +30,13 @@
   <!--END FULL_SIDEBAR-->
 <!--END DISABLE_INDEX-->
 
+<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
+
 <!-- BEGIN LEDGER_HEADER -->
 <style type="text/css">
 @import url("https://ledger-cli.org/stylesheets/site.css");
+header { line-height: 1.3; }
+#main-nav { flex-grow: 0; }
 header, #main-nav { max-width: 60em; margin: auto; }
 header { margin-bottom: 1em; }
 @media print { aside, header { display: none; } }
@@ -55,8 +59,6 @@
 </header>
 <!-- END LEDGER_HEADER -->
 
-<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
-
 <!--BEGIN TITLEAREA-->
 <div id="titlearea">
 <table cellspacing="0" cellpadding="0">