Fix some qdoc-warnings

src/corelib/tools/qmap.cpp:1199: (qdoc) warning: Can't link to 'QMultiMap::unite()'
src/gui/kernel/qevent.cpp:949: (qdoc) warning: Unknown command '\see'
src/gui/painting/qpaintengine_raster.cpp:344: (qdoc) warning: clang found diagnostics parsing \fn Type QRasterPaintEngine::type() const
    error: unknown type name 'Type'
src/gui/doc/src/qtgui.qdoc:45: (qdoc) warning: Can't link to 'Build with CMake'
examples/widgets/doc/src/gallery.qdoc:28: (qdoc) warning: Cannot find file 'widgets/gallery/gallery.pro' or 'widgets/gallery/gallery.pyproject'
src/widgets/kernel/qwidget.cpp:5950: (qdoc) warning: Can't link to 'setFilePath'
src/widgets/kernel/qshortcut.cpp:542: (qdoc) warning: No such parameter 'context' in QShortcut::QShortcut()

Change-Id: I2395af854efebef719d4762da466f69f7c5aab9e
Reviewed-by: Paul Wicking <paul.wicking@qt.io>

examples/widgets/doc/src/gallery.qdoc

@@ -26,7 +26,7 @@
 ****************************************************************************/
 
 /*!
-    \example widgets/gallery
+    \example gallery
     \title Widgets Gallery Example
     \ingroup examples-widgets
     \brief The Widgets Gallery example shows widgets relevant for designing UIs.

src/corelib/tools/qmap.cpp

@@ -1203,7 +1203,7 @@ void QMapDataBase::freeData(QMapDataBase *d)
     key is common to both maps, the resulting map will contain the
     key multiple times.
 
-    \sa QMultiMap::unite()
+    \sa QMap::unite()
 */
 
 /*! \typedef QMap::Iterator

src/gui/doc/src/qtgui.qdoc

@@ -62,7 +62,7 @@
     \include module-use.qdocinc using qt module
     \quotefile overview/using-qt-gui.cmake
 
-    See also the \l[QtDoc]{Build with CMake} overview.
+    See also the \l{Build with CMake} overview.
 
     \section2 Building with qmake
 

src/gui/kernel/qevent.cpp

@@ -946,7 +946,7 @@ QWheelEvent::~QWheelEvent()
     \li or scrolling has ended and the distance did not change anymore (Qt::ScrollEnd).
     \endlist
 
-    \see pixelDelta()
+    \sa pixelDelta()
 */
 
 /*!

src/gui/painting/qpaintengine_raster.cpp

@@ -342,7 +342,7 @@ QRasterPaintEnginePrivate::QRasterPaintEnginePrivate() :
 */
 
 /*!
-    \fn Type QRasterPaintEngine::type() const
+    \fn QPaintEngine::Type QRasterPaintEngine::type() const
     \reimp
 */
 

src/widgets/kernel/qshortcut.cpp

@@ -545,7 +545,7 @@ QShortcut::QShortcut(QWidget *parent)
     match the \a key sequence. Depending on the ambiguity of the
     event, the shortcut will call the \a member function, or the \a
     ambiguousMember function, if the key press was in the shortcut's
-    \a context.
+    \a shortcutContext.
 */
 QShortcut::QShortcut(const QKeySequence &key, QWidget *parent,
                      const char *member, const char *ambiguousMember,

src/widgets/kernel/qwidget.cpp

@@ -5957,9 +5957,9 @@ void QWidget::setWindowTitle(const QString &title)
 
     \note On \macos, window icons represent the active document,
     and will not be displayed unless a file path has also been
-    set using setFilePath.
+    set using setWindowFilePath.
 
-    \sa windowTitle, setFilePath
+    \sa windowTitle, setWindowFilePath
 */
 QIcon QWidget::windowIcon() const
 {