add dbus functionality

--show config window through dbus
--change layout through dbus

app/dbus/org.kde.LatteDock.xml

@@ -7,5 +7,11 @@
         <arg name="identifier" type="s" direction="in"/>
         <arg name="value" type="s" direction="in"/>
     </method>
+    <method name="switchToLayout">
+        <arg name="layout" type="s" direction="in"/>
+    </method>
+    <method name="showSettingsWindow">
+        <arg name="page" type="i" direction="in"/>
+    </method>
   </interface>
 </node>

app/dockcorona.cpp

@@ -844,6 +844,23 @@ void DockCorona::updateDockItemBadge(QString identifier, QString value)
     m_globalShortcuts->updateDockItemBadge(identifier, value);
 }
 
+
+void DockCorona::switchToLayout(QString layout)
+{
+    m_layoutManager->switchToLayout(layout);
+}
+
+void DockCorona::showSettingsWindow(int page)
+{
+    Dock::LatteConfigPage p = Dock::LayoutPage;
+
+    if (page >= Dock::LayoutPage && page <= Dock::PreferencesPage) {
+        p = static_cast<Dock::LatteConfigPage>(page);
+    }
+
+    m_layoutManager->showLatteSettingsDialog(p);
+}
+
 inline void DockCorona::qmlRegisterTypes() const
 {
     qmlRegisterType<QScreen>();

app/dockcorona.h

@@ -104,6 +104,9 @@ public:
 
     KWayland::Client::PlasmaShell *waylandDockCoronaInterface() const;
 
+    void switchToLayout(QString layout);
+    void showSettingsWindow(int page);
+
 public slots:
     void aboutApplication();
     void activateLauncherMenu();

app/layoutmanager.cpp

@@ -785,6 +785,8 @@ bool LayoutManager::switchToLayout(QString layoutName, int previousMemoryUsage)
                 m_corona->universalSettings()->setLastNonAssignedLayoutName(layoutName);
             }
         });
+    } else {
+        qDebug() << "Layout : " << layoutName << " was not found...";
     }
 
     return true;