Doc: move Class View plugin docs to .cpp files.

QDoc does not find docs in the .h files.
Use \brief only for namespaces, classes, enums, and properties.
Use standard wording for \brief and \fn.
Use \a and \c according to guidelines.

Fix grammar and style.

Change-Id: Ib685a03c97ef38661ecc156f61d70085514357fc
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

src/plugins/classview/classviewnavigationwidget.h

@@ -42,11 +42,6 @@ namespace Internal {
 
 class NavigationWidgetPrivate;
 
-/*!
-   \class NavigationWidget
-   \brief A widget for the class view tree
- */
-
 class NavigationWidget : public QWidget
 {
     Q_OBJECT
@@ -55,79 +50,29 @@ public:
     explicit NavigationWidget(QWidget *parent = 0);
     ~NavigationWidget();
 
-    /*!
-       \brief Create QToolbuttons for Navigation Pane Widget
-       \return List with created QToolButtons
-       \sa NavigationWidgetFactory::createWidget
-     */
     QList<QToolButton *> createToolButtons();
 
-    /*!
-       \brief Get flat mode state
-       \return Flat mode state
-     */
     bool flatMode() const;
 
-    /*!
-       \brief Set flat mode state
-       \param flatMode Flat mode state
-     */
     void setFlatMode(bool flatMode);
 
 signals:
-    /*!
-       \brief Widget visibility is changed
-       \param visibility true is plugin becames visible, false otherwise
-     */
     void visibilityChanged(bool visibility);
 
-    /*!
-       \brief Signal to request to go to location
-       \param name File which has to be open
-       \param line Line
-       \param column Column
-       \sa Manager::gotoLocation
-     */
     void requestGotoLocation(const QString &name, int line, int column);
 
-    /*!
-       \brief Signal to request to go to any of location in the list
-       \param locations Symbol locations
-       \sa Manager::gotoLocations
-     */
     void requestGotoLocations(const QList<QVariant> &locations);
 
-    /*!
-       \brief Signal that the widget wants to receive the latest tree info
-       \sa Manager::onRequestTreeDataUpdate
-     */
     void requestTreeDataUpdate();
 
 public slots:
-    /*!
-       \brief Item is activated in the tree view
-       \param index Item index
-     */
     void onItemActivated(const QModelIndex &index);
 
-    /*!
-       \brief Receive a new data for the tree
-       \param result Pointer to the Class View model root item, method does nothing if null passed
-     */
     void onDataUpdate(QSharedPointer<QStandardItem> result);
 
-    /*!
-       \brief Full projects' mode button has been toggled
-       \param state Full projects' mode
-     */
     void onFullProjectsModeToggled(bool state);
 
 protected:
-    /*!
-       \brief Fetch data for expanded items - to be sure that content will exist
-       \param item - does nothing if null
-       \param target - does nothing if null
-     */
     void fetchExpandedItems(QStandardItem *item, const QStandardItem *target) const;
 
     //! implements QWidget::hideEvent