update the api docu to note the use of disabled actions to mean something is informational only

svn path=/trunk/KDE/kdebase/workspace/plasma/lib/; revision=638494

runner.h

@@ -45,6 +45,8 @@ class KDE_EXPORT Runner : public QObject
          * default runner. Other runner's actions will be suggested in the
          * interface. Non-exact matches should be offered via findMatches.
          * The action will be activated if the user selects it.
+         * If the action is informational only and should not be executed,
+         * disable the action with setEnabled( false ).
          */
         QAction* exactMatch( const QString& command );
 
@@ -82,6 +84,8 @@ class KDE_EXPORT Runner : public QObject
          * This method is called when there is text input to match. The runner
          * should fill the matches action collection with one action per match
          * to a maximium of max matches starting at offset in the data set
+         * If the action is informational only and should not be executed,
+         * disable the action with setEnabled( false ).
          */
         virtual void fillMatches( KActionCollection* matches,
                                   const QString& term,