Fixed VTK log message parsing regexp

0x prefix is not printed before object address on Windows,
with latest VTK, therefore the 0x prefix is now optional before
the address.

Added parsing of messages logged using DisplayText() to allow
logging full context, such as file name, line number, etc. for
informational messages.

Libs/Visualization/VTK/Core/ctkVTKErrorLogMessageHandler.cpp

@@ -43,8 +43,10 @@ public:
   vtkTypeMacro(ctkVTKOutputWindow,vtkOutputWindow);
   void PrintSelf(ostream& os, vtkIndent indent);
 
-  ctkVTKOutputWindow():MessageHandler(0),
-    ContextRegExp("[a-zA-Z\\s]+: In (.+), line ([\\d]+)\\n(.+\\(0x[a-fA-F0-9]+\\))\\:\\s(.*)"){}
+  ctkVTKOutputWindow()
+    : MessageHandler(0)
+    , ContextRegExp("[a-zA-Z\\s]+: In (.+), line ([\\d]+)\\n(.+\\((?:0x)?[a-fA-F0-9]+\\))\\:\\s(.*)")
+  {}
   ~ctkVTKOutputWindow(){}
 
   virtual void DisplayText(const char*);
@@ -77,10 +79,14 @@ void ctkVTKOutputWindow::PrintSelf(ostream& os, vtkIndent indent)
 void ctkVTKOutputWindow::DisplayText(const char* text)
 {
   Q_ASSERT(this->MessageHandler);
+
+  ctkErrorLogContext context;
+  QString textOnly = this->parseText(text, context);
+
   this->MessageHandler->handleMessage(
         ctk::qtHandleToString(QThread::currentThreadId()),
         ctkErrorLogLevel::Info,
-        this->MessageHandler->handlerPrettyName(), ctkErrorLogContext(), text);
+        this->MessageHandler->handlerPrettyName(), context, textOnly);
 }
 
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