src: Fixes for release

* clear references count when clearing code view
* fixed scrolling to character in overview lists
* fixed aggregation activation shown in history menu
* fixed same snippet being added twice
* Sourcetrail [Trial] as window title
* fixed undoing trail expand will always reactivate symbol

src/lib_gui/qt/element/QtCodeFile.cpp

@@ -131,6 +131,16 @@ std::string QtCodeFile::getFileName() const
 
 QtCodeSnippet* QtCodeFile::addCodeSnippet(const CodeSnippetParams& params)
 {
+	for (std::shared_ptr<QtCodeSnippet> snippet : m_snippets)
+	{
+		if (snippet->getStartLineNumber() == params.startLineNumber &&
+			snippet->getEndLineNumber() == params.endLineNumber)
+		{
+			return snippet.get();
+		}
+	}
+
+
 	std::shared_ptr<QtCodeSnippet> snippet(new QtCodeSnippet(params, m_navigator, this));
 
 	if (params.reduced)

src/lib_gui/qt/element/QtCodeNavigator.cpp

@@ -229,6 +229,8 @@ void QtCodeNavigator::clear()
 {
 	clearCodeSnippets();
 	clearCaches();
+
+	updateRefLabel();
 }
 
 void QtCodeNavigator::clearCodeSnippets()

src/lib_gui/qt/view/QtGraphView.cpp

@@ -327,7 +327,7 @@ void QtGraphView::pressedCharacterKey(QChar c)
 		Vec2i pos = node->getPosition();
 		Vec2i size = node->getSize();
 
-		view->ensureVisibleAnimated(QRectF(pos.x, pos.y, size.x, size.y + view->height() / 3 * 2), 100, 100);
+		view->ensureVisibleAnimated(QRectF(pos.x, pos.y, size.x, size.y + getViewSize().y / 3 * 2), 100, 100);
 	}
 }