New menu item: Help -> Configuration Folder.

I'm tired of explaining to users where their configuration
folder for GoldenDict is. :)

config.cc

@@ -1228,6 +1228,11 @@ void save( Class const & c ) throw( exError )
   renameAtomically( configFile.fileName(), getConfigFileName() );
 }
 
+QString getConfigDir() throw( exError )
+{
+  return getHomeDir().path() + QDir::separator();
+}
+
 QString getIndexDir() throw( exError )
 {
   QDir result = getHomeDir();

config.hh

@@ -424,6 +424,9 @@ Class load() throw( exError );
 /// Saves the configuration
 void save( Class const & ) throw( exError );
 
+/// Returns the main configuration directory.
+QString getConfigDir() throw( exError );
+
 /// Returns the index directory, where the indices are to be stored.
 QString getIndexDir() throw( exError );
 

mainwindow.cc

@@ -386,6 +386,8 @@ MainWindow::MainWindow( Config::Class & cfg_ ):
            this, SLOT( visitHomepage() ) );
   connect( ui.visitForum, SIGNAL( activated() ),
            this, SLOT( visitForum() ) );
+  connect( ui.openConfigFolder, SIGNAL( activated() ),
+           this, SLOT( openConfigFolder() ) );
   connect( ui.about, SIGNAL( activated() ),
            this, SLOT( showAbout() ) );
 
@@ -2065,6 +2067,11 @@ void MainWindow::visitHomepage()
   QDesktopServices::openUrl( QUrl( "http://goldendict.org/" ) );
 }
 
+void MainWindow::openConfigFolder()
+{
+  QDesktopServices::openUrl( QUrl::fromLocalFile( Config::getConfigDir() ) );
+}
+
 void MainWindow::visitForum()
 {
   QDesktopServices::openUrl( QUrl( "http://goldendict.org/forum/" ) );

mainwindow.hh

@@ -290,6 +290,7 @@ private slots:
 
   void visitHomepage();
   void visitForum();
+  void openConfigFolder();
   void showAbout();
 
   void showDictBarNamesTriggered();

mainwindow.ui

@@ -61,7 +61,7 @@
      <x>0</x>
      <y>0</y>
      <width>653</width>
-     <height>23</height>
+     <height>21</height>
     </rect>
    </property>
    <widget class="QMenu" name="menuFile">
@@ -95,6 +95,8 @@
     <addaction name="visitHomepage"/>
     <addaction name="visitForum"/>
     <addaction name="separator"/>
+    <addaction name="openConfigFolder"/>
+    <addaction name="separator"/>
     <addaction name="about"/>
    </widget>
    <widget class="QMenu" name="menuView">
@@ -404,6 +406,11 @@
     <enum>Qt::WidgetShortcut</enum>
    </property>
   </action>
+  <action name="openConfigFolder">
+   <property name="text">
+    <string>&amp;Configuration Folder</string>
+   </property>
+  </action>
  </widget>
  <customwidgets>
   <customwidget>