CMakePM: Add "generator" link to the kit's CMake settings

This way the user can access all the details from the CMake's generator
documentation.

Change-Id: I90990bf7ec0062122bc3f32d611e19da8f5f9afc
Reviewed-by: Cristian Adam <cristian.adam@qt.io>

src/plugins/cmakeprojectmanager/cmakekitinformation.cpp

@@ -352,6 +352,11 @@ public:
           m_label(createSubWidget<ElidingLabel>()),
           m_changeButton(createSubWidget<QPushButton>())
     {
+        const CMakeTool *tool = CMakeKitAspect::cmakeTool(kit);
+        connect(this, &KitAspectWidget::labelLinkActivated, this, [=](const QString &link) {
+            CMakeTool::openCMakeHelpUrl(tool, "%1/manual/cmake-generators.7.html");
+        });
+
         m_label->setToolTip(ki->description());
         m_changeButton->setText(tr("Change..."));
         refresh();
@@ -561,7 +566,7 @@ CMakeGeneratorKitAspect::CMakeGeneratorKitAspect()
 {
     setObjectName(QLatin1String("CMakeGeneratorKitAspect"));
     setId(GENERATOR_ID);
-    setDisplayName(tr("CMake generator"));
+    setDisplayName(tr("CMake <a href=\"generator\">generator</a>"));
     setDescription(tr("CMake generator defines how a project is built when using CMake.<br>"
                       "This setting is ignored when using other build systems."));
     setPriority(19000);

src/plugins/projectexplorer/kitmanager.cpp

@@ -755,6 +755,9 @@ void KitAspectWidget::addToLayoutWithLabel(QWidget *parent)
     QTC_ASSERT(parent, return);
     auto label = createSubWidget<QLabel>(m_kitInformation->displayName() + ':');
     label->setToolTip(m_kitInformation->description());
+    connect(label, &QLabel::linkActivated, this, [this](const QString &link) {
+        emit labelLinkActivated(link);
+    });
 
     LayoutExtender builder(parent->layout());
     builder.finishRow();