API-Documentation: Add the Utils-library.

Fix API after doc template change.

src/libs/utils/parameteraction.cpp

@@ -33,6 +33,24 @@
 
 #include "parameteraction.h"
 
+/*!
+    \class Utils::ParameterAction
+
+    \brief Intended for actions that act on a 'current',
+     string-type parameter (typically a file name), for example 'Save file %1'.
+
+    The action has 2 states:
+    \list
+    \o <no current parameter> displaying "Do XX" (empty text)
+    \o <parameter present> displaying "Do XX with %1".
+    \endlist
+
+    Provides a slot to set the parameter, changing display
+    and enabled state accordingly.
+    The text passed in should already be translated; parameterText
+    should contain a %1 where the parameter is to be inserted.
+*/
+
 namespace Utils {
 
 ParameterAction::ParameterAction(const QString &emptyText,