Hide tab widget scroll when mouse is not over.

Add context menu for splitter tabs.
Git status count lines of added files and other fixes.
Other code clean up regarding Variant class.

src/tools/ecode/ecode.hpp

@@ -570,6 +570,8 @@ class App : public UICodeEditorSplitter::Client {
 
 	void onCodeEditorFocusChange( UICodeEditor* editor );
 
+	void onTabCreated( UITab* tab, UIWidget* widget );
+
 	bool trySendUnlockedCmd( const KeyEvent& keyEvent );
 
 	FontTrueType* loadFont( const std::string& name, std::string fontPath,