Preparations for context menu actions on URLs (#97)

1. Define click-action so that QTermWidget clients can tell clicking
   from context menu actions
2. Expose filterActions

lib/qtermwidget.cpp

@@ -258,7 +258,7 @@ void QTermWidget::init(int startnow)
 
     // That's OK, FilterChain's dtor takes care of UrlFilter.
     UrlFilter *urlFilter = new UrlFilter();
-    connect(urlFilter, SIGNAL(activated(QUrl)), this, SIGNAL(urlActivated(QUrl)));
+    connect(urlFilter, &UrlFilter::activated, this, &QTermWidget::urlActivated);
     m_impl->m_terminalDisplay->filterChain()->addFilter(urlFilter);
 
     m_searchBar = new SearchBar(this);
@@ -643,6 +643,11 @@ Filter::HotSpot* QTermWidget::getHotSpotAt(int row, int column) const
     return m_impl->m_terminalDisplay->filterChain()->hotSpotAt(row, column);
 }
 
+QList<QAction*> QTermWidget::filterActions(const QPoint& position)
+{
+    return m_impl->m_terminalDisplay->filterActions(position);
+}
+
 int QTermWidget::getPtySlaveFd() const
 {
     return m_impl->m_session->getPtySlaveFd();