Enhance formatting of the docs

(cherry picked from commit 432424d7f7)

doc/manual/index.docbook

@@ -1276,13 +1276,14 @@ For more information, please visit
 <chapter id="tabbarstylsheet">
 <title>Using Style Sheet for the Tab Bar</title>
 <para>
-The default style sheet for the tab bar settings the minimum and maximum tab
-widths.  The user can create a .css file and have Konsole use that as the
-style sheet for the tab bar.  In the .css file, the widget to use is
-QTabBar::tab.
-
+The default style sheet for the tab bar sets the minimum and maximum tab
+widths.  The user can create a <filename role="extension">.css</filename> file and have &konsole; use that as the
+style sheet for the tab bar.  In the <filename role="extension">.css</filename> file, the widget to use is
+<userinput>QTabBar::tab</userinput>.
+</para>
+<para>
 For more information, consider reading
-<ulink url="http://qt-project.org/doc/qt-4.8/stylesheet.html">Qt Project page for Style Sheets</ulink>
+<ulink url="http://qt-project.org/doc/qt-4.8/stylesheet.html">&Qt; Project page for Style Sheets</ulink>
 </para>
 
 <para>