Docs: Get rid of build warnings for Qt Graphs docs

This commit removes faulty dependencies, documents a missed QML method,
and fixes broken links.

Change-Id: I4d9456a06284f73bb15ac14979e955ed5872067c
Reviewed-by: Tomi Korpipää <tomi.korpipaa@qt.io>
(cherry picked from commit f91b4de241)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

src/common/theme/qgraphstheme.cpp

@@ -332,7 +332,7 @@ QT_BEGIN_NAMESPACE
  *
  * The color of the font used for labels.
  *
- * If an axis has specified \l{graphsline.labelTextColor}{labelTextColor} explicitly,
+ * If an axis has specified \l{graphsline::labelTextColor}{labelTextColor} explicitly,
  * this has no effect.
  *
  * The default value depends on \l colorScheme.

src/doc/qtgraphs-toc.qdoc

@@ -21,8 +21,8 @@
                 \li \l {Qt Graphs Data Handling with 3D}{Data Handling}
                 \li \l {Qt Graphs Interacting with Data in 3D}{Interacting with Data}
                 \li \l {Qt Graphs Migration from Qt DataVisualization}{Migration from Qt DataVisualization}
-                \li \l {C++ Classes}
-                \li \l {QML Types}
+                \li \l {Qt Graphs C++ Classes for 3D}{C++ Classes}
+                \li \l {Qt Graphs QML Types for 3D}{QML Types}
             \endlist
         \li \l {Qt Graphs Widgets}
             \list

src/doc/qtgraphs.qdocconf

@@ -18,7 +18,7 @@ exampledirs += \
 imagedirs  += images \
                 ../graphs3d/widget/doc/images
 
-depends = qtcore qtgui qtqml qtquick qtdoc qtcmake qtwidgets qtquickwidgets qtquick3d qtqmlmodels
+depends = qtcore qtgui qtqml qtquick qtdoc qtcmake qtwidgets qtquick3d qtqmlmodels
 
 qhp.projects                 = QtGraphs
 

src/graphs2d/barchart/qbarseries.cpp

@@ -397,6 +397,18 @@ QT_BEGIN_NAMESPACE
     \sa append()
 */
 
+/*!
+    \qmlmethod bool BarSeries::append(BarSet barset)
+
+    Adds a set of bars specified by \a barset to the bar series and takes
+    ownership of it. If the set is null or it already belongs to the series,
+    it will not be appended.
+
+    Returns \c true if appending succeeded.
+
+    \sa insert()
+*/
+
 /*!
     \qmlmethod bool BarSeries::remove(BarSet barset)
     Removes the bar set specified by \a barset from the series. Returns \c true if successful,

src/graphs3d/axis/qabstract3daxis.cpp

@@ -552,7 +552,7 @@ bool QAbstract3DAxis::isScaleLabelsByCount() const
  * The size of the label.
  * The default for this value is \c 1.0.
  *
- * \sa scaleLabelsByCount()
+ * \sa scaleLabelsByCount
  */
 void QAbstract3DAxis::setLabelSize(qreal size)
 {

src/graphs3d/data/qabstract3dseries.cpp

@@ -178,7 +178,7 @@ QT_BEGIN_NAMESPACE
  *
  * Sets the base gradient of the series.
  *
- * \sa colorStyle, {GraphsTheme::seriesGradients}{GraphsTheme.seriesGradients}
+ * \sa colorStyle
  */
 
 /*!

src/graphs3d/data/qspline3dseries.cpp

@@ -21,7 +21,7 @@ QT_BEGIN_NAMESPACE
 
 /*!
  * \qmltype Spline3DSeries
- * \instantiates QSpline3DSeries
+ * \nativetype QSpline3DSeries
  * \inqmlmodule QtGraphs
  * \ingroup graphs_qml_3D
  * \inherits Scatter3DSeries